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Releases

Version 1.5.0

Deprecation and API Warnings

  • PasswordInput and TextAreaInput no longer inherit directly from TextInput (#6593)

Version 1.4.4

Date: 2024-05-31

This release primarily addresses a critical regression in notebook comm channel handling introduced in 1.4.3 and includes a few minor fixes for Tabulator and documentation related issues. Many thanks to @justinwiley for his first contribution to Panel, @twobitunicorn as a returning contributor and the core contributors @maximlt and @philippjfr for their continued work.

Bug fixes

  • Fix notebook CommManager extraction of buffers (#6880)
  • Fix issue when editing timezone-aware datetime column Tabulator (#6879)
  • Ensure Tabulator does not rebuild children when using embed_content with row_content (#6881)
  • Ensure ParamRef, ParamFunction and ParamMethod resolve synchronous generators asynchronously (#6885)
  • Ensure periodic callback cleanup does not error on session warmup (#6886)

Documentation

  • Update OAuth documentation to correctly reference auth_code provider (#6875)
  • Fix CheckBoxGroup value type annotation in reference docs (#6877)

Version 1.4.3

Date: 2024-05-23

This patch release is likely the last in the 1.4.x series. The most important fixes in this release are fixes to ensure keyboard shortcuts do not get triggered inside Panel components for for recent versions of JupyterLab, fixes for OAuth token refreshes, and various documentation fixes. The release also includes a small number of enhancements, including improved UX for the FileSelector. Many thanks to the many contributors to this release including @jrycw, @Coderambling, @cdeil, @twobitunicorn, and the maintainers @Hoxbro, @MarcSkovMadsen, @ahuang11, @maximlt and @philippjfr.

Enhancements

  • Add CSS on mouse interaction with Card (#6636)
  • Make ChatMessage.reaction_icons reactive (#6807)
  • Allow external library to define additional socket handler (#6820)
  • Allow navigating FileSelector with double click (#6843)

Bug fixes

  • Ensure reference is resolved when passing options to from_param (#6762)
  • Ensure token refresh is always scheduled (#6802)
  • Fix small memory leak when caching Design modifiers (#4978)
  • Ensure refreshed tokens can be accessed across processes (#6817)
  • Ensure binary buffers are correctly extracted in notebook CommManager (#6818)
  • Make Tabulator resize handling more robust (#6821)
  • Fix links in panel convert index (#6828)
  • Suppress keyboard shortcuts in notebook output (#6825)
  • Ensure we don't error out when FastDesignProvider is undefined (#6832)
  • Ensure model changes are applied while session is starting (#6835)

Documentation

  • Refactor the hvplot.interactive tutorial utilizing pn.rx (#6700)
  • Update styling after upgrade to latest pydata-sphinx-theme (#6823)
  • Fix bug in Reset Jupyterlite script (#6834)
  • Fix gallery deployment URL (#6831)
  • Add redirects for old documentation pages (#6833)
  • Remove Google Analytics (#6836)
  • Various documentation fixes (#6829)
  • Fix link in gallery index (#6858)

Version 1.4.2

Date: 2024-04-23

This micro-release fixes a number of smaller regressions and bugs including parsing of notebooks. Many thanks to our new contributor @bkreider, our returning contributors, @jrycw and @ea42gh, and our dedicated team of maintainers including @ahuang11, @MarcSkovMadsen and @philippjfr.

Enhancements

  • Allow toggling CTRL+Enter vs Enter to send ChatAreaInput (#6592)
  • Allow adding JS callbacks in ChatInterface.button_properties (#6706)

Bug fixes

  • Fix regression in parsing notebooks served as apps (#6736)
  • Do not include placeholder in ChatInterface.serialize and properly replace placeholder for streams (#6734)
  • Remove Perspective.toggle_config which was erroneously reintroduced in 1.4.1 (#6721)
  • Fix dynamically setting ChatMessage footer_objects/header_objects (#6705)
  • Allow Location.sync of DataFrame parameters (#6745)
  • Fix and improve Plotly event handling (#6753)
  • Fix issue when converting templated apps to Pyodide/PyScript (#6756)
  • Fix styling of loading indicator in Fast design (#6761)
  • Ensure VTK nan, above and below colors are serialized (#6763)
  • Fix issues with Perspective theme and persist config when switching plugins (#6764)
  • Do not restore unmodified parameters in config.set triggering undesirable side-effects ([#6772 (#6771)
  • Make autoreload module cleanup more robust (#6771)
  • Ensure that cache .clear() clears the correct function (#6771)

Documentation

  • Various fixes and cleanup of documentation (#6704, #6707, #6710, #6755,)
  • Document how display full html document in iframe (#6740)
  • Improve Plotly reference documentation (#6751, #6760)

Version 1.4.1

Date: 2024-04-05

This micro-release fixes a number of regressions and other bugs introduced in recent releases and further improves the dashboard builder UI. Additionally it includes some tweaks and polish for the new tutorial material. Many thanks to our new contributor @jrycw, our returning contributors @cdeil and @TheoMathurin and our maintainers @ahuang11, @MarcSkovMadsen, @Hoxbro and @philippjfr for their contributions to this release.

Enhancements

  • Allow rendering raw IPython.display output in dashboard builder (#6657)
  • Improve snapping behavior and add undo functionality in dashboard builder UI (#6687))

Bug Fixes

  • Fix layout persistence issues in dashboard builder (#6602)
  • Ensure Perspective loads in notebooks and docs (#6626)
  • Allow full reset of dashboard builder layout (#6625)
  • Fix issues with VTK colormap serialization (#6651)
  • Allow Tabulator HTMLTemplateFormatter to reference multiple columns (#6663)
  • Fix loading spinner in converted app without template (#6665)
  • Avoid unnecessary rescroll on Column (#6666)
  • Fix dynamically updating description tooltips (#6676)
  • Ensure Perspective is fully loaded before attempting render (#6689))
  • Ensure busy indicators are always reset (#6698)

Styling

  • Only apply styling to Bootstrap buttons (#6610)
  • Change into a slicker Card button icon (#6638)
  • Fix card header margins (#6639)
  • Ensure Perspective renders correctly in all browsers (#6664)

Documentation

  • Improve layout builder docs (#6601)
  • Various Tutorial fixes (#6614, #6669, #6670, #6679)
  • Ensure all docs pages are indexed (#6615)
  • Document Flexbox.gap parameter (#6616)
  • Improve custom template documentation (#6618)
  • Improve Layout Builder Docs (#6619)
  • Improve PyCharm and Colab notebook documentation (#6599)
  • Update gallery endpoint in docs (#6645)
  • Various smaller documentation fixes and improvements (#6682, #6690)

Version 1.4.0

Date: 2024-03-25

This minor release packs a punch both in terms of features, the number of enhancements and bug fixes and perhaps most importantly the addition of a set of tutorials that aim to get novices up-to-speed. The main new feature is a so called EditableTemplate which allows arranging dashboards using a drag-and-drop interface and also has strong integration with JupyterLab previews to go from a notebook to a deployed app without having to worry about writing layout code. Next, this release includes a number of need widgets (NestedSelect, DateRangePicker, ButtonIcon), layouts (Feed) and panes (Textual, WebP), and overhauls the autoreload feature with faster and more robust support for reloading entire modules. Lastly this release, along with Param 2.1.0, continues to build on the new reactive expression API making it easy to write reactive expressions and pipelines including support for streaming data with generators. We really appreciate all the work that went into this release and especially want to call out @MarcSkovMadsen's effort in putting together the new tutorial materials. There's more work to do but it's a huge step forward and we're excited to hear your feedback. We want to extend a special thanks to our amazing new crop of new contributors including @atisor73, @Osuwaidi, @suryako, @Davide-sd, @doraaki, @mayonnaisecolouredbenz7, @CTPassion, @J01024, @l3ender and @Coderambling. Next we want to recognize our returning contributors @vaniisgh, @cdeil, @limx0m, and @TheoMaturin, and the finally the dedicated crew of core contributors which include @maximelt, @Hoxbro, @MarcSkovMadsen, @ahuang11, @mattpap and @philippjfr.

Features

  • Add EditableTemplate to support dashboard builder UI in Jupyter (#5802)
  • Add ChatAreaInput as default text input widget for ChatInterface (#6379)
  • Add NestedSelect widget (#5791, #6011)
  • Add Panel tutorials (#5525, #6208, #6212, #6388, #6425, #6466, #6491)
  • Add DateRangePicker widget (#6027)
  • Add Feed layout and use it as layout for ChatFeed (#6031, #6296)
  • Add WebP pane (#6035)
  • Add ButtonIcon (#6138)
  • Add Textual pane (#6181)

Enhancements

  • Improve --autoreload by using watchfiles and selectively reloading packages (#5894, #6459) Load loading indicator from file instead of inlining (#6112)
  • Allow providing additional stylesheets in card_params (#6242)
  • Add scroll options to permanently toggle on layouts (#6266)
  • Allow choosing position of frozen columns on Tabulator (#6309)
  • Add help message on ChatFeed (#6311)
  • Ensure CSS can be applied to every aspect of ChatMessage (#6346)
  • Add HoloViz logos as ChatMessage avatars (#6348)
  • Add gap parameter to FlexBox (#6354)
  • Set default step of DatetimeRangeSlider to 1 minute (#6373)
  • Add support for passing objects reference to FlexBox (#6387)
  • Allow editable sliders to be embedded (#6391)
  • Add message into css_classes to ChatMessage markup (#6407)
  • Allow appending objects to the ChatMessage header & footer (#6410)
  • Add ability to declare icon label (#6411)
  • Add title and settings and fix datetime to Perspective (#6482)
  • Warn user if loading extension in VSCode or Colab without jupyter_bokeh (#6485)
  • Throttle updates to Boolean indicators (#6481)
  • Add ParamRef baseclass for ParamFunction and ParamMethod (#6392)
  • Add ability to Skip Param<Ref|Function|Method> updates (#6396)
  • Add Param<Ref|Method|Function> and ReactiveExpr to panes module (#6432)
  • Set up param.rx display accessor on import (#6470)
  • Allow using Carto tiles in DeckGL (#6531)
  • Improve VTKJS binary serialization (#6559)
  • Ensure component CSS is pre-loaded if possible, avoiding flicker on load (#6563)

Styling

  • Ensure navbar toggle icon is correct color in BootstrapTemplate (#6111)
  • Change loading background filters to work better in dark themes (#6112)
  • Improve styling of FileInput widget (#6479)
  • Improve Jupyter Preview error handling and error template (#6496)
  • Add scale animation to icons on hover and click (#6376)
  • Redesign index pages (#6497)
  • Improve Tabulator editor text color in Fast design (#6512)
  • Ensure BootstrapTemplate hamburger icon is white (#6562)

Compatibility & Version Updates

  • Bump Perspective version to 2.9.0 (#5722)
  • Upgrade to Bokeh 3.4.x (#6072)
  • Upgrade Vizzu to 0.9.3 (#6476)
  • Bump JSONEditor version to 10.0.1 (#6477)
  • Upgrade to PyScript Next and Pyodide 0.25.0 in panel convert (#6490)
  • Bump vtk.js version to 30.1.0 (#6559)

Bug fixes

  • Add resize handler for FloatPanel (#6201)
  • Fix serving of global template in notebook (#6210)
  • Ensure Tabulator renders in collapsed Card (#6223)
  • Fix issues with VTK, VTKVolume and VTKJS due to webgpu renderer (#6244)
  • Ensure HTML and other markup panes can be emptied (#6303)
  • Ensure collapsed Card does not cause stretching (#6305)
  • Ensure notebook preview always uses server resources (#6317)
  • Remove animation from loading spinner without spin (#6324)
  • Ensure model is only added/removed from Document once (#6342)
  • Ensure loading_indicator resets when configured with context manager (#6343)
  • Fix modal overflow and resizing issues (#6355)
  • Ensure that ripple matches notification size (#6360)
  • Fully re-render CodeEditor on render calls ensuring it displays correctly (#6361)
  • Ensure FileDownload button has correct height (#6362)
  • Ensure HTML model is redrawn if stylesheets is emptied (#6365)
  • Allow providing custom template (#6383)
  • Ensure Debugger renders without error (#6423)
  • Ensure pending writes are dispatched in order and only from correct thread (#6443)
  • Ensure layout reuses model if available (#6446)
  • Improved exception handler in unlocked message dispatch (#6447)
  • Fix display of interactive Matplotlib (#6450)
  • Ensure Plotly pane renders and hides correctly in Card (#6468)
  • Fix issues rendering widget components with Fast design (#6474)
  • Fix binary serialization from JS -> Pyodide (#6490)
  • Avoid overeager garbage collection (#6518)
  • Fix floating point error in IntRangeSlider (#6516)
  • Load JS modules from relative path (#6526)
  • Ensure no events are dispatched before the websocket is open (#6528)
  • Ensure Markdown parsing does not choke on partial links (#6535)
  • Fixes to ensure larger PDFs can be rendered (#6538)
  • Ensure IPywidget comms are only opened once (#6542)
  • Fixes for message handling in Jupyter Preview context (#6547)
  • Fix unnecessary loading of ReactiveHTML resources (#6552)
  • Ensure Template.raw_css has higher precedence than default template CSS (#6554)
  • Avoid asyncio event loop startup issues in some contexts (#6555)
  • Ensure column subset is retained on Tabulator.style (#6560)
  • Ensure bokeh mathjax bundle when mathjax extension is loaded in notebook (#6564)

Chat Components

  • Ensure ChatInterface respect supplied default user (#6290)
  • Ensure ChatMessage internals correctly respect Design (#6304)
  • Fix ChatInterface stop button for synchronous functions (#6312)
  • Include stylesheets downstream, including layouts in ChatMessage (#6405)
  • Ensure ChatMessage header updates dynamically (#6441)
  • Ensure streaming ChatMessage on ChatInterface and mention serialize (#6452)
  • Ensure ChatInterface supports chat input without value_input parameter (#6505)
  • Ensure word breaks to avoid overflow in ChatMessage (#6187, #6509)
  • Ensure nested disabled state stays disabled on ChatFeed (#6507)
  • Allow streaming None as the initial ChatMessage value (#6522)

Documentation

  • Add Roadmap to documentation (#5443)
  • Refactor ReactiveHTML docs (#5448, #6358)
  • Improve HoloViews reference guide (#6065)
  • Improve the user experience for resetting Jupyterlite (#6198)
  • Add explanation docs about APIs (#6289, #6469)
  • Add section headers to Chat reference documentation (#6370)
  • Migrate gallery to new Anaconda DSP instance (#6413)
  • Improve home page (#6422)
  • Adding AWS deployment to documentation (#6434)
  • Update Streamlit comparison (#6467)
  • Add logging how-to guide (#6511)
  • Document pygments dependency for code syntax highlighting (#6519)
  • Add how-to guide on configuring PyCharm (#6525)

Deprecations & Removals

  • Remove Ace alias for CodeEditor
  • Remove ChatBox which has been replaced by panel.chat components
  • Remove HTML.style which is now replaced with HTML.styles
  • Remove Trend.title which is now replaced by Trend.name
  • Remove Viewable.app which is now replaced with pn.io.notebook.show_server
  • Remove Viewable.background which is now replaced with Viewable(styles={'background': ...})
  • Remove Viewable.pprint which is now replaced with print(Viewable(...))

Version 1.3.8

Date: 2024-01-24

This patch release fixes an important regression in the 1.3.6 release that resulted in global state to be incorrectly resolved in certain cases. Many thanks to our new contributor @fohrloop and our maintainers @ahuang11, @Hoxbro and @philippjfr for contributing to this release.

Bug fixes

  • Ensure ReactiveHTML correctly resets Event parameters (#6247)
  • Fix ChatFeed / ChatInterface tests and async generator placeholders (#6245)
  • Fix logic when looking up pn.state.curdoc (#6254)
  • Handle margin=None in layout sizing mode computation (#6267)

Compatibility

  • Updates for compatibility with pandas 2.2 (#6259)

Documentation

  • Fix typos and add a cross-reference in docs (User Profiling) (#6263)
  • Improve documentation on TextAreaInput (#6264)

Version 1.3.7

Date: 2024-01-19

This patch release focuses on a number of fixes and minor enhancements for the chat components and various other smaller improvements and fixes including docs improvements. In particular we want to highlight the new Ploomber deployment guide contributed by @neelash23. Next we want to welcome @jz314, @fayssalelmofatiche and @neelasha23 as new contributors and welcome back @SultanOrazbayev as a returning contributor. Lastly we want to thank the core contributor team, including @MarcSkovMadsen, @ahuang11, @maximlt, @Hoxbro and @philippjfr for their continued efforts maintaining Panel.

Enhancements

  • Add filter_by to ChatMessage.serialize (#6090)
  • Support using an SVG for ToggleIcon (#6127)
  • Add resizable param to TextAreaInput (#6126)
  • Improve date and datetime picker functionality (#6152)
  • Add activity indicator to ChatMessage (#6153)
  • Lazily import bleach HTML sanitizer (#6179)

Bug fixes

  • Fix alignment issues in chat components (#6104, #6135)
  • Fix generator placeholder and optimize updates in Chat components (#6105)
  • Fix issue with callback future handling on Chat components (#6120)
  • Fix bug in Chat interfaces related to pn.state.browser_info (#6122)
  • Allow instantiating empty Matplotlib pane (#6128)
  • Ensure icon displays inline with text on FileDownload (#6133)
  • Fix styling of links in Tabulator fast theme (#6146)
  • Fix passing of card_params on ChatFeed (#6154)
  • Handle Tabulator.title_formatter if is type dict (#6166)
  • Fix per_session caching (#6169)
  • Correctly reshape nd-arrays in Plotly pane (#6174)
  • Handle NaT values on Perspective pane (#6176)
  • Do not rerender output if ReplacementPane object identity is unchanged (#6183)
  • Tabulator: fix valuesLookup set up for older list-like editors (#6192)
  • Fix pyodide loading message styling issues (#6194)
  • More complete patch for the TextEditor to support being rendered in the Shadow DOM (#6222)
  • Add guard to Tabulator ensuring that it does not error when it is not rendered ([#6223](holoviz#6223))
  • Fix race conditions when instantiating Comm in Jupyter causing notifications to break (#6229, #6234)
  • Handle duplicate attempts at refreshing auth tokens (#6233)

Compatibility & Security

  • Upgrade Plotly.js to 2.25.3 to address CVE-2023-46308 (#6230)

Documentation

  • Add Design and Theme explanation documentation (#4741)
  • Fix pyodide execution in documentation
  • Fix wrong and broken link (#5988, #6132)
  • Use GoatCounter for website analytics (#6117)
  • Add Dask How to guide (#4234)
  • Fix Material template notebook .show() call (#6137)
  • Add missing item in docstring (#6167)
  • Ploomber Cloud deployment documentation (#6182)
  • Correct duplicate wording (#6188)
  • Update JupyterLite Altair example to latest API (#6226)

Version 1.3.6

Date: 2023-12-20

This patch release addresses a major regression in server performance introduced in 1.3.5 along with some additional minor fixes. We want to welcome @nenb as a new contributor and want to thank the maintainers @ahuang11, @maximlt and @philippjfr for their contributions to this release.

Enhancements

  • Add explicit size option to ToggleIcon (#6092)

Bug fixes

  • Fix execution of OAuth of callback to refresh access_token (#6084)
  • Fix ChatReactionIcons alignment and trigger reactions correctly (#6086)
  • Change Column scroll_position default value from None to 0 (#6082)
  • Fix issue with accumulating callbacks on server (#6091)
  • Ensure ReactiveExpr renders in pyodide (#6097)
  • Ensure TooltipIcon description can be updated (#6099)
  • Fix IPyWidgets rendering in BootstrapTemplate (#6100)
  • Fix padding and alignment of FileDownload (#6101)

Version 1.3.5

Date: 2023-12-18

This micro-release fixes a large number of issues, applies some performance optimizations and resolves some regressions introduced in previous micro-releases. The main regressions that were addressed include rendering of ChatMessage reaction icons, the ability to obtain an OAuth access_token if it is not a valid JWT token, and issues with async callbacks. We are very pleased to welcome new contributors @mitulb, @fazledyn-or, @benbarn313 and @vaniisgh and want to thank them for their contributions. We also want to thank @cdeil for continuing to contribute and the maintainer team including @MarcSkovMadsen, @Hoxbro, @maximlt, @ahuang11, @droumis and @philippjfr for their continued efforts.

Enhancements

  • Add support for timestamp timezones for ChatMessage (#5961)
  • Replace whitelist blacklist with allowlist denylist (#5975)
  • Allow stopping respond callbacks midway on ChatInterface (#5962)
  • Add support for Image.caption (#6003)
  • Improvements for Fast template styling (#6023)
  • Replace Player widget unicode icons with SVG for more consistency (#6030)
  • Elaborate on ChatInterface callback exception summary (#6046)
  • Add ToggleIcon widget (#6034)
  • Use minified Tabulator.js (#6060)
  • Support rendering GeoDataFrame and GeoSeries in DataFrame pane (#6061)
  • Optimize rendering of ChatMessage (#6069)
  • Apply smaller optimizations for Viewable and ChatMessage (#6074)
  • Add bottom padding to MaterialTemplate (#6075)
  • Update mapbox-gl version for DeckGL pane (#6077)

Bug fixes

  • Remove duplicate property definition of VizzuChart.config (#5947)
  • Remove stray print in Tabulator styler handling (#5944)
  • Fix bug when clearing pn.cache before anything has been cached (#5981)
  • Fix obj.save() when threading is enabled (#5993)
  • Fix Matplotlib responsiveness and improve reference notebook (#5973)
  • Gracefully handle non-decodable access_token (#5994)
  • Ensure onload callbacks scheduled during or after load are still executed (#6005)
  • Don't attempt to set Tabulator text_align on Bokeh formatters that don't support it (#6010)
  • Correctly set error page to be rendered on auth failure (#6014)
  • Fix ChatInterface post callback for default (#5998)
  • Ensure matplotlib backend is set correctly in pyodide worker (#6029)
  • Synchronously create Document patch message to avoid race conditions (#6028)
  • Do not inline CSS if it can be loaded from CDN (#6039)
  • Fix ChatMessage reactions icon rendering (#6034)
  • Fix issues with ChatInterface stop ensuring send button is re-enabled and placeholder removed (#6033)
  • Ensure that Design does not override properties on HoloViews pane (#6051)
  • Ensure async callbacks correctly dispatch events when Websocket is locked (#6052)
  • Fix state.add_periodic_callback when callback is async (#6053)
  • Do no update objects inplace unless explicitly requested fixing issues with non-updating components (#6055)
  • Update sizing of Panel models dynamically (#6054)
  • Make panel.chat.langchain import lazy improving import time (#6056)
  • Change prominence of TooltipIcon (#6057)

Documentation

  • Improve reactive expression notebook (#5960)
  • Document requirement to install pyviz_comms in same env as Jupyter (#5980)
  • Update documentation's pyodide version to use version from panel.io.convert (#5996)

Version 1.3.4

Date: 2023-11-29

This micro-release primarily addresses two important regressions related to the Tabulator text_align option and OAuth failing if the id_token does not contain the required user information. We are very excited to welcome @TBym to the growing list of contributors and thank the core maintainers @Hoxbro, @ahuang11, @MarcSkovMadsen and @philippjfr for their contributions to this release.

Enhancements

  • Allow passing partial function to tabulator filter (#5912)
  • Allow defining custom callbacks for ChatInterface buttons (#5839)

Bug fixes

  • Fix regression when setting text_align and HTMLTemplateFormatter on Tabulator (#5922)
  • Ensure notifications are correctly destroyed (#5924)
  • Fix header overflow issues in FastGridTemplate (#5935)
  • Ensure Audio model respects sizing (#5936)
  • Persist Tabulator selection across pages when pagination='remote' for all selection modes (#5929)
  • Ensure Tabulator styler subset logic is not lost (#5938)
  • Fix regression in OAuth when id_token does not contain user key (#5939)
  • Ensure Vega/Altair plot with responsive width/height respects fixed width/height value when set (#5940)
  • Ensure BrowserInfo is imported by default (#5942)

Documentation

  • Restore plot styling guides in how-to guide (#5919)
  • Document support for emojis on Button labels (#5926)
  • Update and improve SVG pane reference docs (#5934)

Version 1.3.2

Date: 2023-11-22

This micro-release focuses on a number of performance improvements, speeding up the initial rendering of simple apps by 2x in many cases. In addition it includes a number of smaller enhancements for various widgets, better support for async and threading and a number of bug fixes related to authentication, the Tabulator widget and a few other items. We are very pleased to welcome @isumitjha and @fohria as new contributors and want to thank our core team including @maximlt, @Hoxbro, @MarcSkovMadsen, @ahuang11 and @philippjfr for their continuing contributions.

Performance

  • Speed up Pane.clone (#5848)
  • Speed up config attribute access (#5851)
  • Cache templates loaded from string (#5854)
  • Only load extension entrypoints once (#5855)
  • Do not freeze document models unless needed (#5864)

Enhancements

  • Use the compiled version of Pyodide by default (#5808)
  • Add support for AutocompleteInput.search_strategy parameter (#5832)
  • Use stdlib_module_names when determining pyodide dependencies (#5818)
  • Add Tabulator.sortable parameter (#5827)
  • Add delay for tooltip to show up for buttons (#5860)
  • Add serialize method on ChatMessage and ChatFeed (#5764)
  • Allow running onload and defer_load tasks on threads (#5865)
  • Allow Image panes for ChatMessage.avatar (#5870)
  • Allow async callbacks on FileDownload (#5878)
  • Allow running scheduled tasks on threads (#5879)

Bug fixes

  • Fix Google OAuth default scopes (#5823)
  • Fix logic for cleaning up OAuth user (#5824)
  • Set text_align correctly if Tabulator is given Bokeh formatter (#5866)
  • Fix FileDownload embed=True style for Fast design (#5875)
  • Enable Tabulator selection across pages with pagination="remote" and selectable="checkbox" (#5889)
  • Fix rendering of VTK colorbar (#5902)
  • Ensure HoloViews DynamicMap updates when widget dimension has unit (#5904)
  • Add space between MaterialTemplate app and site title separator (#5905)
  • Consistently handle errors during authentication (#5909)

Compatibility

  • Updates for Numpy 2.0 compatibility (#5817)
  • Improve notebook handling when loading bokeh dev versions (#5820)

Documentation

  • Enhance extension and config docs (#5790)
  • Document setting a multiselect header filter on Tabulator (#5825)
  • Add missing GridSpec docs (#5840)
  • Fix for getting_started widgets example (#5859)
  • Add more references to Panel Chat Examples (#5881)
  • Document Tabulator fontawesome css (#5892)
  • Fix broken link to panel tagged items in holoviz blog (#5903)
  • MenuButton docs improvements (#5907)

Version 1.3.1

Date: 2023-10-31

This micro-release primarily ships a variety of bug and regression fixes focusing on auth, the chat components, and WASM (i.e. PyScript and Pyodide) support. It also adds an enhancement to the auth components that now makes it possible to let users access applications as a guest. Many thanks to our new contributors @art3xa, @polivbr and @tupui as well as our core development team including @MarcSkovMadsen, @maximlt, @ahuang11 and @philippjfr.

Enhancements

  • Add support for authenticating as guest using OAuth and basic auth components (#5743)

Bug fixes

  • Ensure ColorMap widget correctly handles shared layout and display parameters (#5732)
  • Fix accessing refreshed access_token (#5734)
  • Ensure Markdown code blocks always wrap (#5738)
  • Fix returning state.user_info if no id_token is present in cookies (#5747)
  • Fix Widget.from_param type annotation (#5754)
  • Fix auto send for ChatInterface with TextAreaInput (#5762)
  • Add support for iframe srcdoc on Location (#5774)
  • Ensure Tabulator.style applies correctly with changing data (#5757)
  • Ensure panel convert can correctly detect transformers_js import (#5772)
  • Adjust ReactiveHTML css resources for relative paths (#5779)
  • Ensure invalid query parameters warn instead of erroring (#5781)
  • Apply pyscript CSS by default without the splashscreen (#5784)
  • Ensure components which require DOM element to be attached can be rendered in Card (#5786)

Documentation

  • Fix typo in examples/reference/widgets/StaticText.ipynb (#5739)
  • Add ReactiveExpr reference docs and change default widget location (#5755, #5760)
  • Fix pyscript WASM example (#5771)
  • Improve documentation for deep linking docs (#5752)

Version 1.3.0

Date: 2023-10-23

This minor release packs many exciting new features, specifically a new panel.chat subpackage containing components with powerful capabilities for interacting with LLM whether local or remote. Secondly this release adds compatibility with Param 2.0 bringing powerful new features including the ability to leverage reactive expressions using the rx wrapper and deeper support for reactively linking parameters, expressions and bound functions on Panel components. Lastly we overhauled the OAuth implementations adding support for code authorization and password based OAuth grant workflows and automatically refreshing the access_token when it expires. Beyond that this release includes many enhancements and numerous bug fixes. Special thanks to our first time contributors @aktech and @monodera and returning contributors @cdeil, @pierrotsmnrd and @TheoMartin. We also want to highlight the contribution of our new core contributor @ahuang11 for developing the chat components and recognize @MarcSkovMadsen and @philippjfr for their efforts on testing and improving these new components. Finally we thank the entire core team @Hoxbro, @MarcSkovMadsen, @maximlt, @ahuang11 and @philippjfr for their continued efforts.

Feature

  • Integrate support for param reactive expressions and expose pn.rx (#5138, #5582)
  • Implement ChatMessage, ChatFeed and ChatInterface components (#5333)
  • Unify OAuth implementations and refresh access_token (#5627)
  • Add ColorMap widget (#5647)

Enhancement

  • Add unit to widget in HoloViews pane if provided (#5535)
  • Allow registering global on_session_destroyed callback (#5585)
  • Implement auto_grow on TextAreaInput (#5592)
  • Add ability to redirect users from authorization callback (#5594)
  • Add support for Path object in FileDownload (#5607)
  • Add authorization_code and password based OAuth login handlers (#5547)
  • Add format to EditableFloatSlider and EditableIntSlider (#5631)
  • Add support for decorating async functions with pn.io.cache (#5649)
  • Map param.Bytes to FileInput widget (#5665)

Bug fixes

  • Fixes for Column invisible scroll_button taking space (#5532)
  • Guard undefined values from being set on BrowserInfo (#5588)
  • Fix thumbnails and use Panel design on index page (#5595)
  • Fix regressions in TextEditor caused by migration to shadow DOM (#5609)
  • Sync location state from request (#5581)
  • Fix Select widget label offset in Material Design (#5639)
  • Override token contents when reusing sessions (#5640)
  • Fix patching a table with a DataFrame with a custom index (#5645)
  • Set FloatPanel status correctly on initialization (#5651)
  • Fix patching table with pd.Timestamp values (#5650)
  • Ensure notifications and browser_info are loaded when HoloViews is loaded (#5657)
  • Gracefully handle resolution of invalid paths in _stylesheets (#5666)
  • Handle patching tables with NaT values (#5675)

Compatibility

  • Add support for Python 3.12 and drop Python 3.8 support
  • Upgrade to Param 2.0 as minimum required version
  • Compatibility with Bokeh 3.3.0

Documentation

  • Improved docs on deploying with GCP (#5531)
  • Add Streamlit migration guide for chat components (#5670)

Version 1.2.3

Date: 2023-09-18

This micro-release primarily fixes some critical regressions that were introduced in the 1.2.2 release, along with some other minor bug fixes. Many thanks for our users for reporting these issues so quickly and @monodera, @ndmlny-qs, @ahuang11, @mattpap, @Hoxbro and @philippjfr for their contributions to the release.

Enhancements

  • Add ability to change admin page endpoint (#5447)
  • Authentication /logout endpoint now serves configurable template (#5514)
  • Add options to sanitize HTML panes (#5516)

Bug fixes

  • Fix regression introduced in 1.2.2 causing issues with periodic callbacks and --autoreload (#5490)
  • Fix regression introduced in 1.2.2 causing issues with authorization callbacks (#5504)
  • Fix regression introduced in 1.2.2 related to logout redirects (#5484)
  • Fix extracting panel convert requirements from requirements.txt (#5509)
  • Ensure visibility is applied correctly for all components when initialized as False (#5508)
  • Fix rendering of backticks in ReactiveHTML (#5512)
  • Ensure Quill TextEditor correctly detects selections and renders HTML (#5511)
  • Fix Markdown rendering with the MyST parser (#5497)
  • Fix OAuth login endpoint when --prefix is set (#5492)

Documentation

  • Update outdated DateRangeSlider.step documentation (#5510)

Version 1.2.2

Date: 2023-08-31

This micro-release is likely the last in the 1.2.x series with a large number of bug fixes and a few enhancements to existing components. The enhancements include the ability to control the scroll position on a Column, improvements for authentication and authorization, the ability to add click event handlers to Perspective and a few other items. Bug fixes also center fixes for authentication, some improvements when rendering Tabulator avoiding various race conditions in its rendering pipeline, and fixes for Perspective, Echarts, DeckGL and a few other components. We are very grateful for a large number of community contributions to this release and welcome and congratulate new contributors @s22chan, @RaulPL, @dogbunny, @thomasjpfan, @SultanOrazbayev and @pierrotsmnrd. Many thanks also to returning contributors @TBym, @Lnk2past, @ndmlny-qs, @owenlamont and our core developer team @MarcSkovMadsen, @ahuang11, @Hoxbro, @maximlt, and @philippjfr.

Enhancements

  • Add scroll button, auto-scroll and scroll position options to Column (#5245, #5365, #5369, #5403)
  • Add cache busting to server CSS resources (#5414)
  • Add Tabulator.title_formatters parameter (#5421)
  • Provide the the accessed path to authorization checks (#5386)
  • Add Perspective click events (#5430)
  • Add and improve pn.io.hold and pn.io.immediate_dispatch context managers to control events (#5444)
  • Allow to passing basic_login_template argument to panel server (#5454)

Bug fixes

  • Ensure BasicAuth forwards to original URL after login (#5357)
  • Correct return types from threading.Thread to panel.io.server.StoppableThread (#5396)
  • Various guards and fixes ensuring Tabulator re-renders correctly (#5410, #5412)
  • Avoid extra executions when executing periodic callback with counter (#5344)
  • Ensure updates to DataModel are correctly scheduled on the event loop (#5360)
  • Fixes for displaying single newlines in Markdown output and add renderer_options (#5376)
  • Allow update of Accordion title without updating content (#5413)
  • Fix authentication handling when prefix is set (#5422)
  • Fix serialization issues affecting TextLayer objects in DeckGL (#5427)
  • Fix height responsiveness of Perspective pane (#5429)
  • Ensure FileDownload button can be clicked anywhere (#5431)
  • Ensure ReactiveHTML children are rendered just like other models (#5434)
  • Set Perspective properties correctly to avoid causing unfocus on keypresses (#5432)
  • Ensure FloatPanel correctly exposes its children to allow linking (#5433)
  • Do no reset Tabulator options if DataFrame indexes are unchanged (#5436)
  • Add ability to work around issues when removing series from ECharts (#5435)
  • Fix race conditions when initializing and rendering IPyWidgets in notebooks (#5462)
  • Tweak Accordion CSS to remove gaps and avoid border overlap (#5460)
  • Ensure columns are deleted when updating traces on Plotly pane to avoid corruption (#5464)
  • Invalidate layout when TextEditor CSS loads (#5465)
  • Ensure FloatPanel reflects closed status (#5466)
  • Fix handling of string dtypes on Perspective pane (#5467)

Documentation

  • Fix incorrectly linked images in streamlit migration guide and VSCode guide (#5327, #5329)
  • Improve developer instructions (#5305, #5380, #5426)

Compatibility

  • Compatibility with param 2.0 watchers (#5350, #5455)

Version 1.2.1

Date: 2023-07-25

This micro-release focuses on a small number of enhancements and rendering related bug fixes. Specifically it adds support for notifying users when the page is ready and when the Websocket disconnects using corresponding config options and upgrades the Vizzu version, thereby adding support for tooltips and enabling animations when the data is updated. The bug fixes are primarily focused on ensuring components such as GridStack and Tabulator render correctly and do not unnecessarily re-render or reload stylesheets. Many thanks and welcome to @owenlamont, @sciemon, @DGLaurits, @Ciemarr and @Kislovskiy for their first contributions to Panel and the maintainers @MarcSkovMadsen, @Hoxbro and @philippjfr for contributing to this release.

Enhancements

  • Add config.disconnect_notification and config.ready_notification (#5244)
  • Add Vizzu tooltip support and allow animations when data is updated (#5258)
  • Style tweaks for Card and Select components (#5280)

Bug fixes

  • Ensure GridStack children are sized correctly after render (#5242)
  • Fix Tabulator expanded row rendering (#5253)
  • Fix bug where local PDF pane is rendered as base64 string (#5264)
  • Avoid full re-rendering when updating HTML based components (#5275)
  • Ensure that Design does not trigger unnecessary updates to stylesheets (#5278)
  • Treat Tabulator row_contents as real children ensuring layout behaves correctly (#5292)
  • Fix Video min_height and max_height (#5296)
  • Make TextEditor invisible until CSS is loaded (#5297)
  • Fix disabled parameter on editable sliders (#5319

Compatibility

  • Update pyodide and pyscript versions and switch to compiled build (#5309)

Documentation

  • Add VS Code How To Guide (#5196)
  • Fix binder (#5257)
  • Various smaller documentation fixes ([#4821], #5249, #5266)
  • Tweak example in the Build an App section of Getting Started (#5302)
  • Update pyodide documentation with latest versions (#5234, #5308)
  • Remove MyST inline directives from JupyterLite notebooks (#5311)

Version 1.2.0

Date: 2023-07-06

This release primarily aims at providing compatibility with Bokeh 3.2 and the upcoming Param 2.0 release. Additionally it includes a number of improvements including the ability to generate multiple outputs from a generator using the new 'append' mode and updates and fixes for Tabulator. We are also excited about the new Streamlit migration guide and a number of bug fixes. Many thanks to @sdc50, @xiaoyang-sde and the core team including @ahuang11, @MarcSkovMadsen, @Hoxbro, @maximlt and @philippjfr for contributing to this release.

Enhancements

  • Add append mode for reactive generator output (#5129)
  • Upgrade to Tabulator 5.5 ([#5182](holoviz#5182))
  • Add support for LoadingSpinner label (#5194)
  • Add the editable parameter to Perspective (#5211)
  • Add support for setting theme_classes on Tabulator (#5216)
  • Move resource handling onto BaseTemplate (#5228)

Bug fixes

  • Correctly process fields on Vega (and altair) selections (#5164)
  • Fix for resource handling particularly when working with Django (#5175)
  • Fix ChatBox bubble width (#5172)
  • Fix Tabulator.visible handling ([#5182](holoviz#5182))
  • Fix programmatic updates to Tabulator.page (#5187)
  • Ensure bokeh events generated in pyodide convert None to null (#5191)
  • Improve notebook detection (#5201)
  • Reduce priority of _repr_<img>_ to ensure _repr_html_ takes precedence (#5217)
  • Ensure we do not modify Tabulator.hidden_columns inplace (#5218)
  • Alignment and styling fixes for text input and button widgets (#5219)
  • Fix updates to Plotly nested properties such as selections (#5227)

Documentation

  • Add Streamlit migration guide (#5027)
  • Improve defer_load how-to guide (#5112)

Compatibility

  • Remove markdown-it-py pins (#5159)
  • Forward compatibility fixes for Param 2.0 (#5169, #5198)
  • Compatibility with Bokeh 3.2 (#5185)

Version 1.1.1

Date: 2023-06-21

The first micro-release in the 1.1.x series brings a large number of bug fixes and some minor enhancements. The most important fixes include compatibility with JupyterLab 4 and improved support for updating ipywidgets. This release saw a lot of contributors and we welcome @TBym, @Glatzli, @theyashi, and @enismaxim1 to the Panel developer community and thank our existing contributors and maintainers @ahuang11, @Hoxbro, @sophiamyang, @maximlt, @MarcSkovMadsen, and @philippjfr for their continued contributions.

Enhancements

  • Implement per_session cache (#5117)
  • Enhancements for ChatBox including methods to update rows and hide names (#5118, #5118)

Bug fixes

  • Fix Progress indicator sizing_mode (#5051)
  • Fix various ChatBox issues (#5065, #5101, #5101)
  • Ensure kernel shutdown futures are not collected in Jupyter server extension (#5069)
  • Add bokeh version check for notebook to better support bokeh dev versions (#5071, #5093)
  • Fix false warning emitted when constructing a Param pane with throttled or onkeyup (#5078)
  • Allow to updating/clearing enabled_dates on DatetimePicker (#5089)
  • Ensure session arguments are correctly parsed by Jupyter executor (#5106)
  • Fix defer_load handling (#5107)
  • Fix styling with filters in Tabulator (#5110)
  • Fix issues when using in filter with single value on Tabulator (#5125)
  • Add fallback if ReactiveHTML shadow DOM lookup fails (#5126)
  • Allow automatic loading of extensions during launch and warn about missing extensions (#5144)
  • Correctly process fields on Vega (and altair) selections (#5145)
  • Immediately dispatch ColumnDataChangedEvent fixing Plotly plots not updating (#5147)

Documentation

  • Overhaul Perspective reference page (#5087)
  • Add new HuggingFace deployment documentation (#5158)
  • Enable and document mathjax extension in Markdown reference (#5158)

Compatibility

  • Correctly serialize new IPyWidget models on creation (#5114)
  • Ensure we handle JupyterLab 4 comm messages correctly (#5140)

Backward compatibility

  • Renamed Trend parameter title to name (#5092)

Version 1.1.0

Date: 2023-05-31

This is the first minor release in the 1.x series with a number of new features and small bug fixes. The main features we are excited about are the new ChatBox widget added by @ahuang11 and support for reactive generators. Many thanks to @ahuang11, @philippjfr and @Hoxbro for contributing to this release and our amazing community for reporting issues.

Features

  • Add the ChatBox widget (#4702)
  • Add a standalone TooltipIcon indicator (#4909)
  • Implement support for reactive generator functions (#5019)
  • Allow setting on_* handlers in constructor (#5026)
  • Allow controlling initial Template sidebar state (#5033)

Bug fixes

  • Handle height responsiveness of HoloViews layout correctly (#5009)
  • Apply Plotly toolbar colors depending on template (#5012)
  • Fix Fast Design style variables (#5015)
  • Allow reactive updates to override constant parameters (#5032)
  • Fix Tabulator header filter styling (#5038)
  • Ensure Jupyter extensions warns users if app has no contents (#5041)

Version 1.0.4

Date: 2023-05-31

Another micro-release in the 1.0.x series addressing small issues reported by our engaged community. Many thanks to @ahuang11, @simzer, @alexmilowski and the core contributors @droumis, @Hoxbro and @philippjfr for contributing to this release.

  • Fix global loading spinner (#4936)
  • Fix issues resolving whether IPyWidget model (#4939)
  • Fix recursive and inplace updates on reactive panes (#4946, #4958)
  • Fix issues with single Select widget (#4947)
  • Ensure CSS config parameters can be passed to Template constructor (#4948)
  • Fixed vizzu data series type conversion for datetime (#4955)
  • Small documentation fixes (#4943, #4960)
  • Fix icon on Toggle and Button widget (#4961)
  • Fix Volume definition on Video pane
  • Ensure icon renders on Toggle button (#4969) (#4970)
  • Ensure Card.header_color is correctly applied (#4971)
  • Update param.List signatures to suppress warnings (#4973)
  • Fix font loading in Vanilla template (#4975)
  • Guard is_file check on Windows (#4985)
  • Fix serialization of Plotly.selection_data (#4987)
  • Speed up dynamic layout updates (#4989)

Version 1.0.3

Date: 2023-05-25

Another micro-release in the 1.0.x series with a number of smaller bug fixes. Most importantly this resolves issues with loading indicators and with apps converted to the pyodide-worker target. Many thanks to @n3011, @Hoxbro and @philippjfr for contributing to this release.

  • Resolve _repr_jpeg_ methods correctly (#4904)
  • Fix handling of queued events in pyodide worker (#4913)
  • Various fixes for loading indicator (#4915)
  • Allow -1 in Tabs.active and allow recovering from closed tabs (#4920)
  • Ensure HoloViews layout is correctly initialized when center is set (#4921)
  • Ensure VSCode editor does not apply white background to Panel output (#4923)
  • Do not error on deserialization errors in notebooks (#4927)
  • Ensure basic auth provider works when dynamically starting server (#4926)
  • Ensure Param pane name is updated when object changes (#4928)
  • Align functionality and styling of FileDownload with Button (#4929)
  • Fix equality comparisons of parameter values when updating a Pane (#4934)
  • Warn about ignored widget parameters on Param pane (#4934)

Version 1.0.2

Date: 2023-05-19

A micro-release in the 1.0.x series with a number of bug fixes and documentation tweaks. Many thanks to @jbednar and @philippjfr for contributing to this release.

Bug fixes

  • Ensure Design stylesheets are not replaced when updating component stylesheets (#4883)
  • Ensure tooltips are rendered correctly as HTML (#4887)
  • Fix loading of index page resources (#4891)
  • Ensure FloatPanel can be rendered in classic notebooks (#4892)
  • Attempt rendering output in notebooks even if not all resources have been initialized (#4893)
  • Do not load large bokeh-mathjax bundle in notebooks by default (#4895)
  • Make Fast template sidebar opening transition smoother (#4898)
  • Ensure new items added to Card layout are rendered (#4899)
  • Fix logo rendering in BasicAuth template (#4900)

Documentation

  • Various documentation tweaks (#4884, #4888, #4889, #4901)
  • Update Vega/Altair reference notebook to use altair 5 APIs (#4894)

Version 1.0.1

Date: 2023-05-18

A micro-release fixing some small issues discovered in Panel 1.0. Thank you to @droumis, @Hoxbro and @philippjfr for contributing fixes.

Bug fixes

  • Ensure Reactive objects wrapped in reactive are re-rendered correctly (#4868)
  • Tweaks for Material Design component inset label styling (#4877)
  • Ensure SlidesTemplate slides changes trigger updates in the pn.state.location.hash (#4878)

Documentation

Version 1.0.0

Date: 2023-05-17

The Panel 1.0 release is finally here and it brings a huge number of improvements. The largest improvements in this release come from an upgrade from Bokeh 2.x to Bokeh 3.x. Bokeh overhauled its internal layout engine and stylesheet handling, making applications significantly more performant and customizable going forward.

This release marks a huge step forward in the usability of Panel but is also just a first step in leveraging many of the new capabilities that the updated layout engine and design system affords. In the coming months we will continue to improve and polish the UI and UX and make it easier for you to extend Panel as needed.

For now we want to thank the many people that contributed to this release either by contributing directly or by testing and providing feedback. Many thanks to the core contributors @MarcSkovMadsen, @Hoxbro, @maximlt, @jbednar, @droumis and @philippjfr and the outside contributors @ahuang11, @cdeil, @MridulS, @AndrewMaged814, @midnighter and @wendrul.

Major Features

The three main features we want to highlight as part of this release are:

Some of the changes related to the new layout engine and design system will require small updates to your existing applications. To make this transition as smooth as possible we have provided an upgrade/migration guide.

New Components

This release also adds a number of exciting new components you can leverage in your applications:

  • Add Swipe layout (#3007)
  • Add Switch widget ([#4130](holoviz#4130))
  • Add Vizzu pane (#4226, #4739)
  • Add BrowserInfo model to expose browser window and navigator APIs (#4533)
  • Add BasicAuth provider for quick password based auth (#4684)
  • Add FloatPanel layout (#4707, #4711)
  • Add a SlidesTemplate based on reveal.js to create interactive presentations (#4798)

Major enhancements

There are also a number of major enhancements in this release that we are very excited about:

  • Improved Markdown rendering (#4688)
  • Add support for tooltips on widgets ([#4130](holoviz#4130), #4621, #4643)
  • Ensure .ipynb and .md based apps can be used as --index (#4432)
  • Add support for selecting format and encoding for Matplotlib image output and implemented responsive Image sizing (#4514)
  • Add support for icons on Button (#4797)
  • Add generic Image pane that auto-detects the image filetype (#4551)
  • Add support for writing applications in Markdown (#4602)
  • Improve support for inline resources for Jupyter (#3013, #4787)
  • Add ability to reuse sessions to speed up rendering (#3679, #4658)
  • Improve notebook resource and extension loading (#4752)
  • Add ability to add global loading spinner to application(s) (#4659)

Documentation

The last major change we want to highlight is a complete overhaul of the documentation, moving from long and difficult-to-navigate user guides to distinct easily applied how-to guides along with separate, longer explanation sections. We also put in significant effort to ensure that most of our documentation can be run interactively in Pyodide or JupyterLite.

Deprecations & API changes

Compatibility

Deprecations

API changes & Backward Compatibility

  • Pandas is now only a (lazy) runtime dependency (#4411)
  • Tabulator.frozen_rows now respects the order of rows in the data instead of the order in which the frozen_rows were defined (#4482](holoviz#4482))
  • Make margin defaults consistent across widgets and panes (#4528)
  • Extension calls must specify all required extensions (#4562)
  • The .embed method now returns a Mimebundle object for rendering (#4791)
  • Remove panel examples CLI command and pyct dependency (#4691)
  • Expose all layout components in top-level API (#4696)

Other Enhancements

Configuration

  • Allow to set the log level of the Admin logger (#3495)
  • Add pn.state.served to simplify determining whether script is executed as an application or in an interactive session (#4252)
  • Add pn.config.loading_indicator to determine whether to show loading indicator by default (#4259)

Jupyter

  • Improve startup, error handling and shutdown of Jupyter kernels (#4364)
  • Log errors in JupyterLab preview to server logs (#4773)
  • Support binary JS -> Python communication in notebooks (#4635)
  • Modify sys.path when running inside Jupyter Kernel (#4489)

Pyodide

  • IPython display compatibility in pyodide builds (#4270)
  • Ensure panel convert respects pn.config (#4359)
  • Fix notification support in Pyodide (#4387)

Miscelleanous

  • Handle cancelling and empty value edit events on Tabulator (#4343)
  • Add favicon to base template (#4626)
  • Ensure CrossSelector filters apply on each keystroke (#4339)
  • Do not re-create Vega.selections object unless selections changed (#4497)
  • Standardize parameter mapping APIs (#4386)
  • Add Plotly.link_figure parameter (#4333)
  • Add support for .JPEG file extension in the JPG pane (#4532)
  • Make periodic callback counter a parameter (#4134)
  • Add Echarts events (#2174)
  • Additional cache support (#4663, #4667)

Bug fixes

  • Fix caching on undecorated Parameterized method (#4332)
  • Ensure that global notification object can be used inside notebook callbacks (#4331)
  • Ensure hash_funcs are applied recursively in cache (#4334)
  • Fix cache FIFO policy bug (#4789)
  • Fix specifying custom index with relative path (#4288)
  • Fix issue reusing FileDownload model (#4328)
  • Fix DeckGL tooltip handling (#4628)
  • Fix NumPy integer/floating checks on Perspective (#4366)
  • Ensure memray profiler temporary file is flushed (#4666)
  • Fix mimetype issue on windows (#4738)
  • Fix Plotly undefined value errors for eventdata (#4355)

Tabulator

  • Ensure updates to Tabulator formatter or editor updates model (#4296, #4781)
  • Ensure Tabulator internal _index_mapping is updated on stream (#4292)
  • Ensure Tabulator header filters aren't treated as regex (#4423)
  • Ensure Tabulator styles are re-applied when local pagination changes (#4795)

Jupyter

  • Ensure JupyterLab preview works on Windows (#4819)
  • Ensure notifications are enabled even if hv.extension has been loaded (#4330)

Version 0.14.4

Date: 2023-03-04

This release is a small bug fix release preceding the upcoming major release of Panel 1.0. Many thanks to the contributors to this release which include @MarcSkovMadsen, @maximlt, @Hoxbro and @philippjfr.

Bugs

  • Fix Tabulator client-side string filters by not parsing them as regex (4423)
  • Fix the RGGPlot pane (#4380)
  • Fix panel examples command by ensuring examples are correctly packaged (#4484)
  • Fix event generation by considering NaNs as equal when comparing Numpy arrays (#4481)
  • Use cache from previous sessions when using to_disk (#4481)
  • Fix relative imports when running inside Jupyter Kernel (#4489)
  • Do not re-create Vega.selections object unless selections changed (#4497)

Enhancements

  • Add support for altair and vega-lite v5 (#4488)

Misc

  • Use latest react-grid from CDN (#4461)

Version 0.14.3

Date: 2023-01-28

This release introduces a large number of bug fixes and minor enhancements. Due to the upcoming release of Panel 1.0 we have also made the unconventional decision to issue new deprecation in a micro release. Specifically the IDOM pane and Viewable.app and Viewable.pprint methods have been scheduled for deprecation. Many thanks to the contributors to this release which include @wendrul, @droumis and the core team @MarcSkovMadsen, @maximlt, @Hoxbro and @philippjfr.

Bugs

Tabulator

  • Ensure streamed rows on Tabulator can be edited (#4292)
  • Ensure changes on Tabulator formatter and editor models are reflected in frontend (#4296)
  • Ensure cancelling edit does not clear cell on Tabulator (#4343)
  • Ensure inserting empty data on numeric column in Tabulator does not error (#4343)

Notebook

  • Fix issues rendering components as ipywidgets for some versions of ipykernel (#4289)
  • Add warning if custom resources could not be loaded in notebook (#4329)
  • Ensure notifications are enabled even if hv.extension has been loaded (#4330)
  • Ensure global notification object can be used inside notebook callbacks (#4331)

Type definitions

  • Fix return type of Widget.from_param (#4335)
  • Ensure type annotation allows str and PathLike objects on panel.serve (#4336)
  • Fix type annotations on panel.io.convert.convert_app(s) (#4342)

Misc

  • Ensure markdown links render correctly in template sidebar (#4222)
  • Improve .applies for ECharts and DeckGL (#4224)
  • Fix specifying custom --index with relative path (#4288)
  • Skip on_load callbacks in liveness check (#4302)
  • Ensure re-rendered FileDownload still fetches live data (#4328)
  • Fix handling of panel.cache on undecorated Parameterized method (#4332)
  • Ensure user provided hash_funcs are applied in panel.cache (#4334)
  • Fix plotly eventdata undefined val (#4355)
  • Ensure panel convert respects panel.config options (#4359)
  • Propagate options from HoloViews and Bokeh plots to enclosing Pane (#4360)
  • Propagate options from dynamic components such as ParamMethod and Interactive to enclosing layout (#4360)

Minor enhancements

  • Allow to set the log level of the Admin logger (#3495)
  • Make refresh_token available in Auth (#4227)
  • Simplify determining whether script is executed as application with pn.state.served property (#4252)
  • Add loading_indicator to global config (#4259)
  • IPython display compatibility in pyodide builds (#4270)
  • Split PanelJupyterExecutor into separate module (#4276)
  • Allow dynamic loading of javascript modules in ReactiveHTML (#4319)
  • Add Plotly.link_figure parameter (#4333)
  • Ensure CrossSelector filters apply on each keystroke (#4339)
  • Improve startup, error handling and shutdown of Jupyter kernels in jupyter_server_extension (#4364)

Compatibility and Version Updates

  • Upgrade plotly.js to 2.10.1 (#4320)
  • Upgrade to pyodide 0.22.1 in panel convert (#4334)
  • Upgrade to pyscript 2022.12.01 in panel convert (#4334)
  • Fix compatibility of Perspective pane with Numpy 1.24 (#4362)

Deprecations

  • Add deprecation warning to IDOM pane (#4293)
  • Add deprecation warning for Viewable.app and Viewable.pprint methods (#4293, #4347)

Documentation

  • Add CONTRIBUTING.md (#4262)
  • Add Gallery VideoStream example (#4047)
  • Add description of literal options to the docs for ReactiveHTML (#3803)

Version 0.14.2

Date: 2022-12-14

This release primarily focuses on bug fixes. In particular it resolves various issues with support for rendering ipywidgets (particularly in ipywidgets>=8.0) and also fixes a number of issues with the Jupyter Server previews. Many thanks for @govinda18, @joelostblom, @banesullivan, @xeldnahcram, @geronimogoemon, @minasouliman, @peterfpeterson, @jlstevens and the core maintainers @maximlt, @Hoxbro, @MarcSkovMadsen and @philippjfr for their contributions to this release.

Enhancements

  • Add support for Tqdm.process_map (#4093)
  • Support non-vtkPolyData types in vtk synchronizer (#4124)
  • Allow invoking convert functions from pyodide (#4135)
  • Support step format in date sliders (#4152)
  • Add a Reacton component to simplify rendering (#4190)

Bugs

  • Ensure Jupyter server extension serves resources, extensions and paths correctly (#4083, #4133, #4202)
  • Ensure IPyWidget comm does not break when new widget is rendered (#4091)
  • Improving detection of comms in VSCode and Google Colab (#4115)
  • Ensure .js mimetype is served correctly on Windows (#4118)
  • Ensure unhiding Tabulator columns renders cells correctly (#4119)
  • Ensure embedded Slider widgets initialize with correct default (#4121)
  • Handle missing event loop in thread gracefully (#4123)
  • Ensure Matplotlib pane handles explicit width/height settings correctly (#4128)
  • Allow Viewer to render servable but non-viewable objects (#4131)
  • Fix regression in tracking sessions in admin interface (#4132)
  • Ensure Tabs headers do not scroll unnecessarily (#4146)
  • Ensure Location model reports as idle (#4159)
  • Fix auth error template rendering (#4162)
  • Fix issues with value on EditableSlider when it is outside fixed_start / fixed_end range (#4169)
  • Ensure ipywidgets events are handled the same way as regular events (#4171)
  • Don't raise TypeError for class which contains __panel__ (#4174)
  • Do not dispatch events if bokeh Document is set to hold events (#4178)
  • Execute onload callbacks immediately in pyodide app (#4191)
  • Improve IPyWidget kernel handling in server contexts (#4195)
  • Fix rendering of IPyWidget with child views in the notebook (#4197)

Docs

  • Add JupyterLite build and instructions (#4122)
  • Document deployment to Hugging Face Spaces (#4143)

Version 0.14.1

Date: 2022-10-28

This release primarily addresses regressions introduced in 0.14.0 and various long standing bugs. Many thanks to external contributors @liu-kan and @KedoKudo and the maintainers @Hoxbro, @maximlt and @philippjfr for contributing a number of fixes.

Minor enhancements

  • Improve support for requests in pyodide (#3973)
  • Add option to clear value of DatetimePicker (#3990)
  • Add support for hashing dates in pn.cache (#4004)
  • Silence EMPTY_LAYOUT warnings (#4056)

Compatibility

  • Fix Jupyterlite and latest PyScript compatibility (#4040)

Bugs

Webassembly conversion

  • Correctly handle resource mode in when converting to WebAssembly (#3967)

Jupyter and Server

  • Correctly handle future exceptions on threads (#3977)
  • Fix panel serve index template (#3980)
  • Do not error if curdoc has been destroyed (#3994)
  • Ensure extensions loaded in jupyter kernel are served by StaticHandler (#4000)
  • Various fixes for OAuth handling with pn.serve (#4006)
  • Fix bug in on_load callback exception handling (#4007)
  • Ensure periodic callbacks are only started on main thread (#4011)
  • Ensure jupyter server extension handles explicit root_dir (#4029)
  • Ensure futures are correctly awaited when executed on thread (#4031)

Components

  • Ensure Tabulator handles filtering on edited values correctly if show_index=False (#3988, #4016)
  • Ensure Tabulator declares numeric sorter for numeric dtypes (#3999)
  • Fix regression initializing DiscreteSlider with non-integer value (#4009)
  • Ensure that template.config.raw_css is correctly applied (#4018)
  • Fix handling MenuButton clicks when split=True (#4021)
  • Ensure styling on Tabulator with empty DataFrame does not error (#4028)
  • Allow changing level on Debugger widget (#4057

Version 0.14.0

Date: 2022-09-30

This release focuses on three main themes:

  • Support for running Panel apps entirely in the browser using WebAssembly (via Pyodide and PyScript)
  • Improvements in the app-user experience by making it easier to build responsive and performant applications
  • Improvements in the developer experience through static typing and docstrings.

Many, many thanks to everyone who filed issues or contributed to this release. In particular we would like to thank @janimo, @xavArtley, @thuydotm, @jmosbacher, @dmarx, @2WoLpH, @ipopa144, @sdc50 for contributions and @philippjfr, @Hoxbro, @maximlt, and @MarcSkovMadsen for ongoing maintenance and development.

Features

  • Add support for converting Panel apps to pyscript/pyodide (#3817, #3830, #3851, #3856, #3857, #3858, #3860, #3861, #3863, #3864, #3868, #3878)
  • Manage our own CDN to improve performance and reliability for delivering JS payloads (#3867, #3870)
  • Add ability to defer_load of components (#3882)
  • Add pn.widget helper function (#1826, #3589)
  • Add config.exception_handler to easily capture, log and notify users about errors (#3893)
  • Implement pn.cache function for memoization support (#2411)
  • Rewrite server extension to run Panel applications in kernels so that previews run in the same environment as the deployed app (#3763)
  • Add ability to define authorization callback (#3777)
  • Support memray profiler (#3509)
  • Add liveness endpoint (#3832)
  • Add ability to configure exception handler (#3896)

Enhancements

  • Ensure OAuth redirects to requested app and retains query arguments (#3555)
  • Add extension entry point (#3738)
  • Update Admin Logs page to use Tabulator (#3694)
  • Ensure location.unsync unsets query params (#3806)
  • Allow None value on numeric sliders and LiteralInput (#3174)
  • Allow serving admin panel with pn.serve (#3798)
  • Improve ReactiveHTML loop support and validation (#3813)
  • Support declaring Perspective.plugin_config pane (#3814)
  • Do not flicker busy indicator during --autoreload check (#3804)
  • Improve robustness of state.curdoc in threaded and async contexts (#3776, #3810, #3834)
  • Support datetime bounds for DatetimePicker and DatetimeRangePicker (#3788)
  • Allow setting the Oauth provider using environment variables (#3698)
  • Implement Player.value_throttled (#3756)
  • Ensure that URL query parameters are preserved during OAuth (#3656)
  • Improve Markdown code syntax highlighting (#3758)
  • Ensure components do not re-render if background or loading parameters change (#3599)
  • Add ability to define admin dashboard plugins (#3668)
  • Do not calculate embed state for disabled widgets (#3757)
  • Add hard bounds to editable sliders (#3739)
  • Add bundling of shared resources (#3894)
  • Add Tabulator as default param.DataFrame widget (#3912)

Documentation

Compatibility & Version updates

  • Support ipywidgets>=8.0 (#3782)
  • Bump jsoneditor package (#3838)
  • Upgrade to Tabulator 5.3.2 (#3784)
  • Improve Django compatibility (#3843, #3835)
  • Remove all usage of deprecated Pane

Bugs

Server

  • Ensure closed websocket does not cause errors
  • Handle session and websocket close cleanly (#3769)
  • Fix prefix handling for admin page (#3809)
  • Support admin dashboard in multi-process deployments (#3812)
  • Improve document cleanup when not invoked using server_destroy (#3842)
  • Ensure pn.state.execute dispatches immediately if possible (#3859)
  • Ensure autoload.js resources are appropriately prefixed (#3873)

Notebook

  • Fix support for copying cells and creating new views in JupyterLab (#3652)
  • Ensure output renders in VSCode notebook with latest ipywidgets (#3765)
  • Resolve issues with Jupyter slowdown due to event_loop patching on Windows (#3770)
    • Ensure old comm managers do not raise errors in notebook (#3853)
    • Simplify rendering of ipywidget (#3937)

Tabulator

  • Do not re-render Tabulator on css_classes or background change (#3598)
  • Ensure expand icon updates on Tabulator.expanded change (#3703)
  • Update page Parameter when pagination is 'local' (#3704)
  • Do not apply sorters on Tabulator cell edits (#3744)
  • Ensure Tabulator.controls renders (#3768)
  • Ensure correctness of event row and selection indices in Tabulator (#3771, #3841)
  • Fix issues with frontend and backend sorters being out of sync in Tabulator (#3825, #3839)
  • Fix default values of a list header filter in Tabulator (#3826)
  • Fix the edit event with a python filter in Tabulator (#3829)
  • Disable client-side date filtering on Tabulator (#3849)
  • Support editing of pandas masked array dtypes in Tabulator (#3850)
  • Fix issues editing a cell when client-side filtering applied (#3852)
  • Do not recompute data when local pagination is enabled (#3854)
  • Don't skip filtering when the column name is undefined (#3862)

Misc

  • Fix FileInput.save (#3579)
  • Fix issues with Matplotlib.high_dpi option (#3591, #3594)
  • Ensure layout recomputes on HTML/Markdown re-rerender (#3616)
  • Allow overriding all widget parameters on Param pane (#3754)
  • Ensure DatePicker start/end are transformed when jslinked (#3759)
  • Ensure notifications can be enabled without a template (#3820)
  • Ensure ReactiveHTML inline callbacks on loop variables return correct node (#3840)
  • Ensure that Perspective does not take precedence on empty dict (#3936)
  • Improve sizing_mode behavior when width/height are specified (#3955)
  • Do not load notyf resources unless notifications are enabled (#3958)

Version 0.13.1

Date: 2022-05-20

Enhancements

  • Add repr to cell and edit events (#3434)
  • Improvements for pyodide handling (#3444, #3508, #3511)
  • Add support for Plotly animation frames (#3449)
  • Implement single and multi-selection in Vega pane (#3470, #3499, #3505)
  • Add typehints to help developers and users (#3476)
  • Add pn.state.execute method to run callbacks in the right context (#3550)
  • Add support for asynchronous on_edit/on_click Tabulator callbacks (#3550)
  • Add DatetimeRangeSlider widget (#3548)

Bug fixes

  • Fix pyodide array buffer conversion (#3409)
  • Allow placeholder to be updated on TextEditor (#3427)
  • Fix issues editing data in sorted columns (#3431)
  • Ensure bokeh correctly detects whether HTML/Markdown contains latex (#3438)
  • Ensure notifications work on server created with pn.serve and .show (#3445)
  • Replace slickgrid background image in custom FastTemplate CSS (#3461)
  • Ensure param.Array is synced correctly in ReactiveHTML (#3456)
  • Ensure selection on filtered Tabulator does not raise out-of-bounds error (#3462)
  • Ensure updating Tabulator does not reset scroll position (#3450)
  • Various fixes for FastTemplate CSS (#3464)
  • Ensure Tabulator on_click and on_edit events return correct row when paginated (#3410)
  • Fix broken JupyterLab preview (#3469)
  • Skip Tabulator row selection when clicking on expand button (#3474)
  • Ensure overflow in MaterialTemplate is not clipped (#3492)
  • Allow providing --index for directory style apps (#3493)
  • Ensure Tabulator expanded rows are sized correctly after re-render (#3507)
  • Make CodeHandler robust to document that has been destroyed (#3510)
  • Do not sync DataFrame widget sorters parameter with bokeh model (#3527)
  • Ensure that HoloViews callback events are not auto-dispatched (#3528)
  • Ensure non-updateable Pane can be updated inside Tabs (#3532)
  • Fix slowdown of JupyterLab on Windows (#3531)
  • Fix issue with inverted data when editing a cell in a sorted Tabulator column (#3531)
  • Ensure Tabulator has correct layout after re-render (#3536)
  • Do not log events generated by admin page on the admin page (#3539)
  • Fix Tabulator events when the original column is not a string (#3541)

Documentation

  • Adds docstrings to layouts (#3417)
  • Show how to filter categorical and temporal data from Altair/VegaLite (#3401)
  • Document how to make a Tabulator column non-editable (#3489)

Version 0.13.0

Date: 2022-04-15

Blog post: https://blog.holoviz.org/panel_0.13.0.html

Features

  • Add support for scheduling global callbacks (#2661)
  • MathJax now supported in Markdown and HTML (#2847)
  • Improved support for async (e.g. in ParamMethod/ParamFunction, bind, onload etc.) (#2964, #3264, #2737)
  • Support rendering Panel objects in Jupyterlite and Pyodide (#3252, #3361, #3381)
  • Add JSONEditor widget (#1974)
  • Add quill.js based TextEditor widget (#2875)
  • Add GenericLoginHandler for custom OAuth (#2873, #2960)
  • Implement Notifications API for templates (#3093)
  • Implement built-in threading (#2597, #2632, #3081)
  • Implement profiling page for Panel (#2645, #2664, #2667, #2707, #2905)
  • Implement support for Vega events (#2592)
  • Implement ArrayInput widget (#2047)
  • Add Debugger widget (#2548)
  • Add LinearGauge indicator (#3222)
  • Add ComponentResourceHandler to server (#3284, #3289, #3303)

Enhancements

Components

  • Editable sliders name can be changed (#2678)
  • Make Plotly pane resize when window resizes (#2704)
  • Viewer objects can now be used with pn.serve (#2769)
  • VTK improvement for NaN handling (#2826)
  • Add support for configuring Vega output (#2846)
  • Add a groups parameter to Select widget (#2876)
  • Add Card.hide_header option (#2947)
  • Support bytes and pathlib.Path objects on Image (#2963, #3294)
  • Add programmatic control over Player widget (#2970, #2994)
  • Add alphabetical and custom sort to Param (#2986)
  • Add autoplay and muted to Audio and Video (#3053)
  • Add a disabled_options parameter to a custom Select widget (#3067)
  • Expose the orientation parameter of the button group widgets (#3083)
  • Add support for rendering pandas styler objects (#3152)
  • Viewer now better at working with depends functions (#3159)
  • Improve support for jinja2 loops in ReactiveHTML (#3236)
  • Add ability to require explicit load of ReactiveHTML extension (#3254)
  • Improve datetime handling of sliders (#3276)
  • Add support for multiple files in FileInput.save (#3300)
  • Add improved Tabs model that resolves sizing and hover issues (#3301, #3321, #3329)

Tabulator

  • Add support to expand rows in Tabulator (#2762, #2837, #3010, #3163)
  • Implement client-side filtering on Tabulator (#2815, #3298)
  • Add Tabulator.header_align parameter (#2861)
  • Implement Tabulator.on_edit callbacks (#2887, #3209, #2958)
  • Implement DateEditor and DatetimeEditor for Tabulator (#2899, #3008)
  • Implement Tabulator.buttons (#3111)
  • Redesign Tabulator.styles handling (#3175)
  • Set default alignment for Tabulator (#3194)
  • Bidirectionally sync Tabulator.sorters (#3217)
  • Add support for setting percentage widths on Tabulator columns (#3239)
  • Add Tabulator.on_click callback (#3245)
  • Restore Tabulator scroll position after patch (#3273)
  • Enable max row limits for Tabulator (#3306)

Notebook

  • Add basic JupyterLab theme support (#2848)
  • Support jupyter server root_dir with lab extension (#3172)
  • Avoid multiple extension execution in the notebook (#3266)
  • Added fullpath to jupyter_server_extension (#3270)

General improvements

  • Warn users if extension is not loaded before server page is rendered (#2766)
  • Sync URL location hash interactively (#2982)
  • Change accent and header background color for Fast Templates (#2984)
  • Add thread safety and TTL to pn.state.as_cached (#3198)
  • Add py.typed file to support mypy (#3055)
  • Handle authentication errors (#3096)
  • Support saving png to file-like objects (#3155)
  • Check if there are any query parameters in baseurl and adds it to location.search if possible (#3214)
  • Improve handling of --index CLI argument (#3221)
  • Fix event dispatch (#3231)
  • Add azure oauth v2.0 endpoint support (#3224)
  • Ensure gc.collect is not excessively called (#3259)
  • Added panel.reactive and panel.viewable to namespace (#3157)
  • Consistent handling of page title (#3290)

Bugs

Components

  • Fix warnings in ReactiveHTML regex (#2786)
  • Fixed UTF-8 decoding in Terminal widget (#2880)
  • Allow a param.Selector with no objects to be casted to AutocompleteInput (#2966)
  • Update ButtonGroup value when changing options (#2999)
  • Fix TQDM style color reset (#3040)
  • Fix align-items on Flexbox (#3122)
  • Fix issue serializing Spinner with negative value (#3154)
  • Fixes for jslinking HoloViews components (#3165)
  • BooleanStatus and LoadingSpinner now update when changing color (#3191)
  • Fix Widget.from_param when precedence is negative (#3199)
  • Ensure DiscreteSlider label is updated (#3278)
  • Ensure ReactiveHTML template variables only escapes exact matches (#3279)
  • Fix handling of single and empty options on DiscreteSlider (#3297)
  • Ensure Progress correctly initializes as indeterminate (#3307)
  • Always resolve DOM nodes in ReactiveHTML._scripts (#3311)
  • Fixes CrossSelector.disabled parameter (#3326)
  • Fix EditableSlider updates when no value_throttled is set (#3387)

Tabulator

  • Fix HTMLTemplateFormatter on Tabulator (#2781)
  • Fix layout of Tabulator with non-default theme (#3147)
  • Ensure Tabulator selection is not reset on patch (#3287)
  • Fix Tabulator.download method (#3292)
  • Restore ability to limit number of selectable rows on Tabulato (#3295)
  • Ensure Tabulator value update reports correct old value (#3308)

Templates

  • Fix Fast template vertical slider CSS (#3045)
  • Fix template theme.css (#3057)
  • Ensure roots are rendered into GoldenTemplate (#3313)
  • Ensure correct theme is applied to HoloViews pane in template (#3386)

General

  • Added check for bool in Location.parse_query (#2759)
  • Ensure cleanup happens when enabling --warm or --autoreload with Bokeh 2.4 (#2760)
  • Ensure autoload.js correctly determines state.rel_path (#2776)
  • Fix issue with .app method (#3047)
  • Add document argument to django.py autoload_js_script call (#3100)
  • Avoid sending messages on closed or closing Websocket (#3115)
  • Fix Django resource handling (#3116)
  • Fix handling of loading_max_height (#3205)
  • Fix Django DocConsumer (#3281)
  • Fix jupyter_server_config for preview server extension (#3291)
  • Fix handling of oauth_provider argument to panel.io.server.serve (#3293)
  • Allow exporting absolute paths when saving (#3305)

Documentation

  • Added ToggleGroup docs (#2679)
  • Adds a code of conduct (#2892)
  • Add docstrings to sliders module (#3176)
  • Gallery Examples for Graphviz and NetworkX (#2732)
  • Add layouts + throttling sections to Performance docs (#3171)
  • Adds Plotly styling gallery notebook (#3038)
  • Adds a matplotlib style guide notebook to gallery (#3036)
  • Adds vega altair style example for the gallery. (#3032)
  • Wrap new gallery examples into apps (#2546)
  • Add docstring to panel module (#3177)
  • added documentation for gcp (#3119)
  • Add docs about the file size limits of the FileInput widget (#3044)
  • Add docstrings for most widgets and panes (#3352, #3353, #3354, #3359, #3365, #3366, #3367, #3369)

Compatibility

  • Update to latest version of Perspective (#3318)
  • Update Vega version (#3320)
  • Update ipywidgets support for compatibility with latest bokeh (#3206, #3299)
  • Bump plotly.js version (#3227)
  • Updates to Param 2.0 API (#2845)
  • Updates for Python 3.10 deprecations (#3065)
  • Update and improve DeckGL pane (#3158)

API Changes

  • Make Param.mapping public (#3173)
  • Switch DatetimePicker start/end to param.Date (#3202)
  • Perspective parameters renamed: row_pivots -> split_by, column_pivots -> group_by and computed_columns -> expressions (#3318)

Version 0.12.7

Date: 2021-03-27

The 0.12.7 release primarily fixes an incompatibility with the new jinja2 3.1.0 release. Many thanks to @maartenbreddels, @govinda18, @raybellwaves and the maintainers @maximlt and @philippjfr for contributing further fixes to this release.

Bug fixes:

  • Wrong offset when memoryview format is non-byte (#3206)
  • Support jupyter server root_dir with lab extension (#3172)

Docs:

  • add note on enabling panel widget on Jupyter Lab (#3029)
  • Remove redundant and confusing JupyterLab install instructions (#3037)

Compatibility:

  • Fix jinja2 imports (#3258)

Version 0.12.6

Date: 2021-12-08

The 0.12.6 release fixes a major regression introduced in the last release along with a small number of pre-existing bugs.

Regressions:

  • Always load imported bokeh extensions (#2957)
  • Fix regression rendering HoloViews plotly backend (#2961)

Bug fixes:

  • Do not run Ace import on initialization (#2959)
  • Improve handling of ReactiveHTML cleanup (#2974, #2993)
  • Ensure empty Str has same height as non-empty (#2981)
  • Ensure Tabulator supports grouping on numeric columns (#2987)
  • Fix Tabulator with multi-index and pagination (#2989)
  • Allow index as column name in table widgets (#2990)
  • Ensure TemplateActions component does not have height (#2997)

Version 0.12.5

Date: 2021-11-23

The 0.12.5 release contains a larger number of bug fixes and minor enhancements. Many thanks to @pmav99, @samuelyeewl, @xavArtley, @L8Y, @Prashant0kgp, @t-houssian, @kristw, @jlstevens and the maintainers @maximlt, @MarcSkovMadsen and @philippjfr for their contributions to this release.

Compatibility:

  • Ensure ipywidget rendering is compatible with ipykernel>6 and bokeh>2.4 (#2798)
  • Build panel.js against bokeh.js 2.4.2 (#2945)

Enhancements:

  • Add 'light' to list of button types (#2814, #2816)
  • Make OAuth cookie expiry configurable (#2724)
  • Run onload callbacks with --warm option (#2844)
  • Improve Plotly responsive sizing behavior (#2838)
  • Adds escape parameter to DataFrame pane to enable using html markup (#2893)
  • Allow to update the completions options from a parameter (#2895)
  • Tabs cache dynamic contents (#2909)
  • Allow setting a maximum height for the loading indicator (#2910)
  • Ensure loading of MathJax bundle is optional (#2919)

Bug fixes:

  • Resolve issues with inline resources on save (#2794)
  • Restore ability to set a maximum number of selectable rows on Tabulator (#2791)
  • Fixed bug where Tabulator with remote pagination would modify the wrong rows (#2801)
  • Ensure non-exported requirejs modules do not error (#2808)
  • Ensure Tabulator checkbox selection only happens in checkbox column (#2812)
  • Vtkvolume correction of dimensions order (#2818)
  • Allow data item to miss optional field in Vega pane (#2853)
  • Allow to set AutoCompleteInput in a Param pane (#2874)
  • Fix Terminal keystroke and size handling (#2878)
  • Fix Tabulator styles on scroll (#2881)
  • Do not sync Indicator properties from frontend to avoid errors (#2886)
  • Fix roundtrip of datetimes on ReactiveData components (#2888)
  • Fix handling of Plotly pane in Tabs (#2890)
  • Fix bokeh colorbar background for dark theme (#2897)
  • Fix issues when streaming or patching ReactiveData (#2900)
  • Ensure stream and patch events do not boomerang (#2902)
  • Fixes for Card rendering in MaterialTemplate (#2911, #2912)
  • Ensure HoloViews matplotlib output uses tight layout (#2920)
  • Fix decoding of single quoted strings in url parameters (#2925)
  • Fix Tabulator checkbox selection (#2931)
  • Fix Vega pane sizing issues (#2933)
  • Ensure toggled Accordion only triggers one event on change of active Card (#2934)
  • Ensure LiteralInput JS deserializer does not insert extra spaces (#2935)
  • Fix issue in detecting script data assignment in ReactiveHTML (#2939)
  • Ensure Card collapsible icon offset is computed robustly (#2940)
  • Ensure --autoreload does not reload panel modules (#2941)
  • Ensure pn.state.curdoc is available to async callbacks (#2942)

Documentation:

CVEs:

  • Update jQuery to remediate CVEs (#2885)

Version 0.12.4

Date: 2021-09-24

The 0.12.4 release fixes a number of bugs and a regression of the autoreload feature in 0.12.2 and 0.12.3.

Compatibility:

  • Fix issues with --autoreload caused by changes in Bokeh 2.4 (#2755)

Enhancements:

  • Ensure user is warned if an extension was not loaded in time on server (#2765)
  • Allow Viewer classes to be served (#2768)
  • Add support for rendering .ico files and pathlib objects (#2757)

Bug fixes:

  • Fixed export of vtk.js module (#2562)
  • Fix broken HTMLTemplateFormatter on Tabulator (#2730)
  • Fix serialization issues of Panel components on ReactiveHTML (#2743)
  • Ensure FlexBox behaves like a layout and makes its children discoverable (#2779)
  • Ensure Plotly plots can be updated in tabs (#2747)
  • Fix embedding of Panel apps in Flask (#2727)
  • Ensure Spinner widget honors bounds when created from Param object (#2740)
  • Ensure Tabulator style does not disappear after resize event (#2770)
  • Fix PeriodicCallback errors (#2764)
  • Fix syncing of boolean types with URL parameters (#2758)
  • Ensure Tabulator.download_menu applies kwargs to the filename TextInput (#2763)
  • Ensure Tabulator does not error when no Styler is defined (#2785)

Documentation:

  • Fix MaterialUI custom component example (#2680)
  • Fix image url in Markdown reference gallery example (#2734)
  • Add Folium thumbnail in reference gallery (#2744)

Version 0.12.3

Date: 2021-09-17

The 0.12.2 release unfortunately has a compatibility issue with Bokeh 2.4 which broke the show() method. This release fixes this regression.

  • Patch Bokeh to fix show() (#2748)

Version 0.12.2

Date: 2021-09-16

This a patch release with a small number of bug fixes and compatibility for bokeh 2.4. Many thanks to the contributors @Stubatiger, @maximlt, @nghenzi and the maintainers @MarcSkovMadsen and @philippjfr for the fixes in this release.

Enhancements:

  • Add option to hide constant parameters on Param pane (#2637)
  • Added on_session_destroyed callback (#2659)
  • Stricter validation for linking syntax in ReactiveHTML._template (#2689)

Bug fixes:

  • Improved thread safety (#2631)
  • Ensure sessions get distinct files in config (#2646)
  • Fix bug when updating Trend data (#2647)
  • Ensure sorters are applied correctly after updating Tabulator value (#2639)
  • Correctly reflect filtered data on Tabulator.selection (#2676
  • Unescape child literal HTML in ReactiveHTML (#2690)
  • Ensure Trend indicator can be rendered in layout (#2694)

Documentation:

  • Enhance templates docs (#2658)
  • Add Folium reference notebook (#2672)

Compatibility:

Version 0.12.1

Date: 2021-08-10

This is a patch release with a small number of fixes following the 0.12.0 release. Many thanks to the maintainers @MarcSkovMadsen and @philippjfr for the fixes in this release.

Enhancements:

  • Bundle .map files during build to allow source mapping (#2591)
  • Various style improvements for Fast templates (#2604, #2609, #2611, #2615)
  • Implement hierarchical aggregation for Tabulator (#2624)

Bug fixes:

  • Fix logo on Fast templates (#2184)
  • Fix height responsiveness of Folium pane (#2231)
  • Fix bug updating Tqdm indicator (#2554)
  • Ensure --autoreload doesn't error on cleaned up session (#2570)
  • Don't use persisted layout if save_layout=False (#2579)
  • Pin version of tqdm with asyncio support (#2595)
  • Reset layout when resetting grid template layout (#2576)
  • Fix line-height issues in Fast templates (#2600)
  • Clean up sessions after warmup and ensure periodic callbacks are cleaned up (#2601)

Documentation:

  • Enable JupyterLab preview button on binder (#2545)
  • Update theme toggle documentation for Fast templates (#2560)
  • Update Fast template documentation and enable full screen (#2577)
  • Fix binder links on website (#2590)
  • Add docs about loading the ipywidgets extension (#2594)

Version 0.12.0

Date: 2021-07-18

Blog post: https://blog.holoviz.org/panel_0.12.0.html

The 0.12.0 release is a minor release with a lot of exciting and a huge amount of bug fixes. We are very excited about the growing community and the many contributions we received. In particular we would like to thank @douglas-raillard-arm, @mathrick, @jlstevens, @hyamanieu, @Liam-Deacon, @Stubatiger, @ablythed, @syamajala, @Hoxbro, @jbednar, @brl0, @OBITORASU, @fleming79, dhruvbalwada and @rmorshea for contributing various fixes and improvements and the core developers @xavArtley, @MarcSkovMadsen and @philippjfr for continuing to push the development of Panel.

Features:

Enhancements:

  • Add empty Progress bar (#2088)
  • Optimize initialization of templates (#2096)
  • Serialize Perspective schema (#2130)
  • Updated JSON pane to accept single quote and wrap properly (#2143, #2443)
  • Improvements for Perspective (#2153)
  • Improve handling of server prefix and proxied deployment scenarios (#2159, #2162)
  • Add support for setting bokeh theme (#2164, #2166, #2170)
  • Completely overhauled the default index template (#2198, #2340)
  • Enhancements for Template modals (#2269, #2523)
  • Make the Template sidebar width configurable (#2301)
  • Improve look and feel and styling of Fast templates (#2303, #2469, #2484, #2488)
  • Allow setting kwargs in Reactive.controls (#2304)
  • Add global configuration variable to always throttle sliders (#2306)
  • Add support for controlling text alignment in DataFrame and Tabulator (#2331)
  • Add Tabulator theme for Fast Templates (#2425)
  • Add ability to make only certain Tabulator rows selectable (#2433)
  • Add visible parameter to all components (#2440)
  • Send Plotly restyle and relayout events rather than full updates (#2445)
  • Add push_notebook helper function for syncing bokeh property changes in notebooks (#2447)
  • Improve visual styling of Card (#2343, #2348, #2376, #2437, #2527)
  • Ensure config variables are configured per user session (#2358, #2455, #2481)
  • Add save_layout and prevent_collision to ReactTemplate and FastGridTemplate (#2296, #2357)
  • Add ability to declare root application from panel serve (#2392)
  • Support jslinking Parameterized class (#2441)
  • Improve config.sizing_mode behavior (#2442)
  • Add separate RangeSlider value_start and value_end parameters (#2457, #2468)
  • Allow saving Templates (#2461)
  • Bundle Tabulator resources to allow usage in airgapped environment (#2471)
  • Ensure Trend indicator title wraps (#2483)
  • Scroll on Tabulator selection (#2503)
  • Increase notebook resource load timeout (#2515)
  • Auto-detect VSCode and Colab comms (#2536)
  • Add tooltip to Tabulator cells to see unformatted value (#2543)

Bug fixes:

  • Fix missing video in Video (#2109)
  • use idom.config to set dist dir (#2117)
  • Remove bootstrap CSS from FastGridTemplate (#2123)
  • Fix issues with Ace z-index (#2126)
  • Fix updating of Tabulator selection property (#2128)
  • Ensure changes on ReactiveData source are scheduled correctly (#2134)
  • Fixed Player looping when start is 0 (#2141)
  • Fix divide by zero issues on Trend indicator (#2148)
  • Ensure GridSpec override handles duplicate matches (#2150)
  • Fix for loading parameter widget linking (#2160)
  • Fix Tabulator ajax call on empty data (#2161)
  • Fix Tabulator sorting and data initialization (#2163)
  • Fix editing Tabulator with filters applied (#2165)
  • Fix theming on HoloViews plot updates (#2209)
  • Fixed data handling on Perspective pane (#2212)
  • Improve template and resource management for png export (#2221)
  • Improve and standardize selection behavior of Tabulator (#2230)
  • Ensure JS changes to Plotly pane are applied if not explicitly triggered (#2251)
  • Fix server-side Tabulator selection changes (#2252)
  • Fix update of Param subobjects (#2255)
  • Add support for vtkCornerAnnotations (#2257)
  • Improve request handling for remote pagination on Tabulator (#2265)
  • Allow setting Param precedence to None (#2266)
  • Disable nested field separators on Tabulator (#2289)
  • Fix errors when applying Perspective filters (#2300, #2521)
  • Ensure Param pane handles changes to unknown parameter (#2346)
  • Fix issues with local Audio and Video (#2380)
  • Ensure ReactiveData emits correct old data in event (#2398)
  • Ensure Plotly interactivity works when Plotly panes are displayed in tabs (#2418, #2463)
  • Fix Ace widget disabled parameter (#2449)
  • Ensure external resources are configured correctly on save (#2452)
  • Ensure table formatters and editors are copied on render to avoid bokeh errors (#2453)
  • Allow unicode auth response body (#2462)
  • Workaround TypeError for non-string json keys on Plotly pane (#2465)
  • Fix issue with throttled updates on Param (#2470)
  • Ensure Tabulator style is applied while streaming (#2478)
  • Fix issues setting resources on save (#2492)
  • Fix VideoStream unpause (#2508)
  • Ensure DataFrame and Tabulator widget data can be updated in callback (#2510)
  • Fix chaining of bind functions (#2513)
  • Fix broken serialisation when syncing url parameters (#2520)
  • Fix Perspective for string types (#2525)
  • Fix race condition in --autoreload (#2539)

Documentation:

  • Update Server_Deployment.ipynb (#2118)
  • Expand description of watch=True in Param.ipynb (#2120)
  • Switch to PyData Sphinx Theme (#2139)
  • Replace altair iris example with penguins (#2213)
  • Enable Binder (#2198)
  • Updates and fixes for Developer Guide (#2381)
  • Fixed Tabs documentation (#2448)
  • Added basic description and example of the Tabulator.configuration parameter (#2412)
  • Add parameters to Plotly reference guide (#2385)
  • Add useful links to developer docs (#2319)
  • Add documentation about parameterized components (#2454)
  • Demonstrate how to lazily load tabs (#2479)

Compatibility:

  • Compatibility with HoloViews 2.0 (#2344)
  • Fix Tabulator styling with pandas 1.3 (#2512)

Deprecations:

  • Remove add_periodic_callback method (#2439)
  • Remove deprecated panel.callbacks modules
  • Remove deprecated Ace pane and Audio Widget (#2427)
  • Remove Progress widget docs (#2451)
  • Tabulator no longer loaded by default, must be initialized with pn.extension('tabulator'](https://github.com/holoviz/panel/issues/)) (#2364)

Version 0.11.3

Date: 2021-04-14

The 0.11.3 release is another micro-release in the 0.11 series primarily focused on updating the documentation theme and a regression in loading Tabulator data.

Bug fixes:

  • Fix Tabulator sorting and data initialization (#2163)
  • Improved handling of IDOM build directory (#2168)

Documentation:

  • Switch to PyData Sphinx Theme (#2139)

Version 0.11.2

Date: 2021-04-08

The 0.11.2 release is a micro-release fixing a number of smaller bugs. Many thanks to @Hoxbro, @dhruvbalwada, @rmorshea, @MarcSkovMadsen, @fleming79, @OBITURASU and @philippjfr for their contributions to this release.

Enhancements:

  • Optimize adding of roots to templates to avoid multiple preprocessing cycles (#2096)
  • Use schema to support date(time) dtypes on Perspective (#2130)

Bug fixes:

  • Fix regression on Video pane causing video not to be rendered at all (#2109)
  • Fix missing closing tag in Fast templates (#2121)
  • Remove bootstrap CSS from FastGridTemplate (#2123)
  • Ensure Tabulator selection can be set from Python (#2128)
  • Ensure changes on ReactiveData objects are scheduled correctly on server (#2134)
  • Fix for Player widget when start value is 0 (#2141)
  • Support single quotes on JSON pane (#2143)
  • Fix divide by zero issues when value_change is computed from zero baseline (#2148)
  • Ensure GridSpec handles overrides across multiple cells (#2150)
  • Fix for loading parameter widget linking (#2160)
  • Use relative URLs for resource loading to ensure proxied apps work (#2159)
  • Fix Tabulator ajax call on empty data (#2161)

Documentation:

  • Fix typo in Binder section of server deployment documentation (#2118)
  • Improve documentation surrounding watch=True in Param user guide (#2120)

Compatibility:

  • Ensure IDOM pane configures paths correctly for latest version (#2117, #2132)

Version 0.11.1

Date: 2021-03-15

The 0.11.1 release is a micro-release addressing a number of smaller bugs in the last release. Many thanks to the contributors to this release including @Hoxbro, @xavArtley, @Jacob-Barhak and @philippjfr.

Enhancements:

  • Allow setting horizontal and vertical alignment separately (#2072)
  • Expose widgets visible property (#2065)
  • Allow bind to extract dependencies and evaluate other dynamic functions (#2056)
  • Allow setting root_directory on FileSelector widget ([#2086](holoviz#2086

Bug fixes:

  • Fixed loading of jQuery in BootstrapTemplate (#2057)
  • Fix VTK imports to ensure VTKVolume pane renders grids (#2071)
  • Fix loading of template resources from relative paths (#2067)
  • Fix Spinner component overflow (#2070)
  • Handle integer column names on Perspective widget (#2069)
  • Fix bundling of template resources (#2076)
  • Fix value_throttled in pn.depends decorator (#2085)

Compatibility:

  • Switch GitHub OAuth to use header authorization token (#2073)

Version 0.11.0

Date: 2021-03-01

The 0.11.0 release brings a number of exciting new features to Panel as well as some enhancements and bug fixes. This release is also required for Bokeh 2.3 compatibility since a lot of changes to the Bokeh property system required updates. Many thanks to the many contributors to this release including @MarcSkovMadsen, @xavArtley, @hyamanieu, @cloud-rocket, @kcpevey, @kaseyrussell, @miliante, @AjayThorve and @philippjfr.

Major features:

  • A Perspective pane based on the FINOS Perspective library (#2034)
  • Implement --autoreload functionality for the Panel server (#1983)
  • Add --warm option to panel serve, useful for pre-loading items into the state cache (#1971)
  • Add ability to define JS modules and Template specific resources (#1967)
  • panel.serve now supports serving static files and Bokeh apps, not just Panel apps (#1939)
  • Add a TrendIndicator for conveniently showing history and value of a numeric quantity (#1895)
  • Add TextToSpeech widget (#1878)
  • Add SpeechToText widget (#1880)
  • Add loading parameter and spinners to all components (#1730, #2026)
  • Add IDOM pane to develop interactive HTML components in Python (#2004)
  • Add powerful new Tabulator widget for flexible and configurable display of tabular data (#1531, #1887)

Enhancements:

  • Add watch argument to bind function so that covers all the features of pn.depends (#2000)
  • Add format parameter to DatetimeRangeInput widget (#2043)
  • Allow ParamMethod and ParamFunction to evaluate lazily (#1966)
  • Add value_input parameter to TextInput widgets (#2007)
  • Implement Glyph3dMapper support for VTK panes (#2002, #2003)
  • Add Jupyter server extension to serve resources (#1982)
  • Enhancements for DarkTheme (#1964)
  • Add refresh functionality to FileSelector (#1962)
  • Add support for Auth0 authentication (#1934)
  • Avoid recursive preprocessing slowing down rendering (#1852)
  • Add support for per-layer tooltips on DeckGL pane (#1846)
  • Add Viewer baseclass for custom user components (#2045)

Bug fixes:

  • Fixed FileSelector file icon on selected files (#2046)
  • Drop query args when checking URLs (#2037)
  • Fix Card.header_background propagation (#2035)
  • Disable GoldenTemplate sidebar when empty (#2017)
  • Ensure Card.collapsed and Accordion.active parameters are synced (#2009)
  • Fix inline resources when saving (#1956)
  • Switch Param pane widget type when bounds (un)defined (#1953)

Compatibility:

  • Compatibility with Bokeh>=2.3 (#1948, #1988, #1991)
  • Updated ECharts pane to 5.0.2 of JS library (#2016)

Documentation:

  • Document pn.bind in API user guide (#1973)

Version 0.10.3

Date: 2021-01-18

Another micro-release in the 0.10.x series focusing primarily on bug and regression fixes. Many thanks to @miliante, @MarcSkovMadsen, @Hoxbro, @jlstevens, @jbednar and @philippjfr.

Bug fixes:

  • Fix inverted axes on HoloViews plots (#1732)
  • Fix enabling/disabling of FileDownload widget (#1510, #1820)
  • Fix issues serving template resources on server with route prefix (#1821)
  • Fixes for rendering ECharts from pyecharts (#1874, #1876)
  • Fix issues with scroll behavior when expanding/collapsing Card/Accordion (#1833, #1884)
  • Ensure DiscreSlider label is correctly linked to value (#1906)
  • Fix support for setting header_color and header_background on all templates (#1872)
  • Ensure that Template preprocessors are applied during initialization (#1922)

Enhancements:

  • Support throttled in Param widget (#1800)
  • Support rendering of hvPlot Interactive objects (#1824)
  • Allow recording session launch time in server session_info (#1909)
  • Add Button.value parameter (#1910)
  • Support upload of multiple parameters on FileInput (#1911)
  • Improve support for DarkTheme in templates (#1855, #1856)

Documentation:

  • Fixed IntSlider and FloatSlider example (#1825)
  • Updated instructions for using Panel in JupyterLab (#1908)

Version 0.10.2

Date: 2020-11-13

This is another micro-release primarily fixing various minor bugs in functionality introduced as part of the 0.10.0 release. Many thanks to @MarcSkovMadsen, @ahuang11, @xavArtley, @Hoxbro, @jbednar and @philippjfr.

Bug fixes:

  • Fix various issues with Template CSS (#1663, #1742)
  • Fix BytesIO/StringIO buffers as input to image panes (#1711)
  • Fix out-of-bounds errors when assigning to GridSpec with fixed ncols (#1721)
  • Fix deserialization issues for Plotly.hover_data (#1722)
  • Fixed updating of Alert parameters after initialization (#1725)
  • Fix ordering of items added to Template areas (#1736)
  • Fix interactivity for items in Card (#1750)
  • Ensure onload callbacks are only run once (#1746)
  • Allow overriding items in grid based templates (#1741)
  • Ensure ECharts and ipywidget rerender when in Card (#1765)
  • Ensure template dark theme persists on HoloViews plots (#1764)
  • Fix responsive height in Plotly pane (#1770)
  • Ensure image panes resize in width and height (#1777)
  • Fix issues with Location.sync serialization (#1784)
  • Add throttled argument to interact (#1259)
  • ECharts pane now loads echarts-gl for 3D support (#1785)

Enhancements:

  • Improved OAuth encryption key validation (#1762)
  • Add progress option to .save method (#1776)

Version 0.10.1

Date: 2020-10-27

This is a micro release of Paanel primarily containing bug fixes following the 0.10.0 release. Many thanks to @MarcSkovMadsen, @jbednar and @philippjfr for contributing fixes to this release.

Enhancements:

  • Add pn.bind function to bind parameters to a function (#1629)

Bug fixes:

  • Fix WidgetBox CSS (#855)
  • Fix CSS load order in Templates (#1698)
  • Allow setting DiscreteSlider orientation (#1683)
  • Ensure JS callbacks and links are only set up once on templates (#1700)
  • Initialize pipeline only once (#1705)
  • Allow using NumberInput as Param pane widget (#1708)

Version 0.10.0

Date: 2020-10-23

This is a minor but jam-packed release of Panel, with a slew of new features and enhancements, plus a wide array of minor fixes and improvements to the documentation, and website. Many thanks to the people who contributed to this release, including @philippjfr, @MarkSkovMadsen (alert pane, templates, docs), @xavArtley (VTK improvements, templates, input/spinner widgets), @maximlt (panel serve), @jbednar (docs, reviewing), @kebowen (templates), @ahuang11 (datepicker), @nghenzi (react template, bugfixes), @nritsche (panel serve), @ltalirz (autocomplete input), @BoBednar (docs), @tmikolajczyk, @halilbay, @Hoxbro, and @ceball (testing and automation).

Features:

Enhancements:

  • Allow defining explicit embed states (#1274)
  • Implement __add__ and __iadd__ on layouts (#1282)
  • Add support for hierarchical multi-indexed DataFrame (#1383)
  • Add show_index option to DataFrame widget (#1488)
  • Link widgets with same name during embed (#1543)
  • Wait until JS dependency is loaded before rendering (#1577)
  • For AutocompleteInput, allow user-defined values (#1588) and case-insensitivity (#1548)
  • Allow dates to be disabled in DatePicker (#1524)
  • Enable new features for a Bokeh DataTable (#1512)
  • Panel serve improvements: MethodType parameter (#1450), title per app (#1354)
  • Server deployment guide for Azure (#1350)
  • Add Widget.from_param classmethod (#1344)
  • More options for ACE widget (#1391)

Bugfixes and minor improvements:

Backwards compatibility:

  • Switch away from inline resources in notebook (#1538, #1678)
  • Viewable.add_periodic_callback is deprecated; use pn.state.add_periodic_callback (#1542)
  • Use widget_type instead of type to override Param widget type in Param pane (#1614)
  • Spinner widget is now called NumberInput (#1513)

Version 0.9.7

The 0.9.6 release unfortunately caused a major regression in layout performance due to the way optimizations in Bokeh and Panel interacted. This release fixes this regression.

  • Fix regression in layout performance (#1453)

Version 0.9.6

This is a minor bug fix release primarily for compatibility with Bokeh versions >=2.1.0 along with a variety of important bug fixes. Many thanks for the many people who contributed to this release including @mattpap, @kebowen730, @xavArtley, @maximlt, @jbednar, @mycarta, @basnijholt, @jbednar and @philippjfr.

  • Compatibility with Bokeh 2.1 (#1424, #1428)
  • Fixes for FileDownload widget handling of callbacks (#1246, #1306)
  • Improvements and fixes for Param pane widget mapping (#1301, #1342, #1378)
  • Fixed bugs handling of closed Tabs (#1337)
  • Fix bug in layout clone method (#1349)
  • Improvements for Player widget (#1353, #1360)
  • Fix for jslink on Bokeh models (#1358)
  • Fix for rendering geometries in Vega pane (#1359)
  • Fix issue with HoloViews pane overriding selected renderer (#1429)
  • Fix issues with JSON pane depth parameter and rerendering (#1431)
  • Fixed param.Date and param.CalenderDate parameter mappings (#1433, #1434)
  • Fixed issue with enabling num_procs on pn.serve (#1436)
  • Warn if a particular extension could not be loaded (#1437)
  • Fix issues with garbage collection and potential memory leaks (#1407)
  • Support recent versions of pydeck in DeckGL pane (#1443)
  • Ensure JS callbacks on widget created from Parameters are initialized (#1439)

Version 0.9.5

Date: 2019-04-04

This release primarily focused on improvements and additions to the documentation. Many thanks to @MarcSkovMadsen, @philippjfr and @michaelaye for contributing to this release.

Enhancements:

  • Add Template.save with ability to save to HTML and PNG but not embed (#1224)

Bug fixes:

  • Fixed formatting of datetimes in DataFrame widget (#1221)
  • Add panel/models/vtk/ subpackage to MANIFEST to ensure it is shipped with packages

Documentation:

  • Add guidance about developing custom models (#1220)
  • Add Folium example to gallery (#1189)
  • Add FileDownload and FileInput example to gallery (#1193)

Version 0.9.4

Date: 2020-04-02

This is a minor release fixing a number of regressions and compatibility issues which continue to crop up due to the upgrade to Bokeh 2.0 Additionally this release completely overhauls how communication in notebook environments are handled, eliminating the need to register custom callbacks with inlined JS callbacks to sync properties. Many thanks to the contributors to this release including @hyamanieu, @maximlt, @mattpap and the maintainer @philippjfr.

Enhancements:

  • Switch to using CommManager in notebook hugely simplifying comms in notebooks and reducing the amount of inlined Javascript (#1171)
  • Add ability to serve Flask apps directly using pn.serve (#1215)

Bug fixes:

  • Fix bug in Template which caused all roots to instantiate two models for each component (#1216)
  • Fixed bug with Bokeh 2.0 DataPicker datetime format (#1187)
  • Publish Panel.js to CDN to allow static HTML exports with CDN resources to work (#1190)
  • Handle bug in rendering Vega models with singular dataset (#1201)
  • Removed escaping workaround for HTML models resulting in broken static exports (#1206)
  • Fixed bug closing Tabs (#1208)
  • Embed Panel logo in server index.html (#1209)

Compatibility:

  • This release adds compatibility with Bokeh 2.0.1 which caused a regression in loading custom models

Version 0.9.3

Date: 2019-03-21

This is a minor release fixing an issue with recent versions of Tornado. It also fixes issue with the packages built on the PyViz conda channel.

Version 0.9.2

Date: 2019-03-21

This is a minor release with a number of bug fixes. Many thanks to @ceball, @Guillemdb and @philippjfr for contributing these fixes.

Bug fixes:

Version 0.9.1

Date: 2019-03-19

This is very minor releases fixing small regressions in the 0.9.0 release:

Bug fixes:

Version 0.9.0

Date: 2019-03-13

This is a major release primarily for compatibility with the recent Bokeh 2.0 release. Additionally this release has a small number of features and bug fixes:

Features:

Bug fixes:

Removals:

  • Slider no longer support callback_policy and callback_throttle as they have been replaced by the value_throttled property in bokeh

Version 0.8.1

Date: 2019-03-11

This release is a minor release with a number of bug fixes and minor enhancements. Many thanks to the community of contributors including @bstadlbauer, @ltalirz @ceball and @gmoutsofor submitting the fixes and the maintainers, including @xavArtley, @jbednar and @philippjfr, for continued development.

Minor enhancements:

  • Added verbose option to display server address (#1098](holoviz#1098)) [@philippjfr]

Bug fixes:

Version 0.8.0

Date: 2019-01-31

This release focuses primarily on solidifying existing functionality, significantly improving performance and fixing a number of important bugs. Additionally this release contains exciting new functionality, including several new components. We want to thank the many contributors to this release (a full list is provided at the bottom), particularly @MarcSkovMadsen (the author of awesome-panel.org) and @xavArtley, who has been hard at work at improving VTK support. We also want to thank the remaining contributors including @philippjfr, @ceball, @jbednar, @jlstevens, @Italirz, @mattpap, @Jacob-Barhak, @stefjunod and @kgullikson88. This release required only minimal changes in existing APIs and added a small number of new ones, reflecting the fact that Panel is now relatively stable and is progressing steadily towards a 1.0 release.

Major Features & Enhancements

  • Added new DeckGL pane (#1019, #1027)
  • Major improvements to support for JS linking (#1007)
  • Huge performance improvements when nesting a lot of components deeply (#867, #888, #895, #988)
  • Add support for displaying callback errors and print output in the notebook simplifying debugging (#977)
  • Add support for dynamically populating Tabs (#995)
  • Added FileSelector widget to browse the servers file system and select files (#909)
  • Add pn.serve function to serve multiple apps at once on the same serve (#963)
  • Add a JSON pane to display json data in a tree format (#953)

Enhancements

  • Updated Parameter mappings (#999)
  • Ensure that closed tabs update Tabs.objects (#973)
  • Fixed HoloViews axis linking across Template roots (#980)
  • Merge FactorRange when linking HoloViews axes (#968)
  • Expose title and other kwargs on .show() (#962)
  • Let FileInput widget set filename (#956
  • Expose further bokeh CLI commands and added help (#951)
  • Enable responsive sizing for Vega/altair pane (#949)
  • Added encode parameter to SVG pane (#913)
  • Improve Markdown handling including syntax highlighting and indentation (#881)
  • Add ability to define Template variables (#815)
  • Allow configuring responsive behavior globally (#851)
  • Ensure that changes applied in callbacks are reflected on the frontend immediately (#857)
  • Add ability to add axes coordinates to VTK view (#817)
  • Add config option for safe_embed which ensures all state is recorded (#1040)
  • Implemented __signature__ for tab completion (#1029)

Bug fixes

  • Fixed DataFrame widget selection parameter (#989)
  • Fixes for rendering long strings on Windows systems (#986)
  • Ensure that panel does not modify user objects (#967)
  • Fix multi-level expand Param subobject (#965)
  • Ensure load_notebook is executed only once (#1000)
  • Fixed bug updating StaticText on server (#964)
  • Do not link HoloViews axes with different types (#937)
  • Ensure that integer sliders are actually integers (#876)
  • Ensure that GridBox contents maintain size (#971)

Compatibility

Backwards compatibility

  • The Ace pane has been deprecated in favor of the Ace widget (#908)

Docs

  • Updated Django multiple app example and user guide (#928) [@stefjunod]
  • Clarify developer installation instructions, and fix up some metadata. (#952, #978)
  • Added Param reference notebook (#944)
  • Added Divider reference notebook

Version 0.7.0

Date: 2019-11-18T21:22:16Z

This major release includes significant new functionality along with important bug and documentation fixes, including contributions from @philippjfr (maintainer and lead developer), @xavArtley (VTK support), @jbednar (docs), @DancingQuanta (FileInput), @a-recknagel (Python 3.8 support, misc), @julwin (TextAreaInput, PasswordInput), @rs2 (example notebooks), @xtaje (default values), @Karamya (Audio widget), @ceball, @ahuang11 , @eddienko, @Jacob-Barhak, @jlstevens, @jsignell, @kleavor, @lsetiawan, @mattpap, @maxibor, and @RedBeardCode.

Major enhancements:

  • Added pn.ipywidget() function for using panels and panes as ipwidgets, e.g. in voila (#745, #755, #771)
  • Greatly expanded and improved Pipeline, which now allows branching graphs (#712, #735, #737, #770)
  • Added streaming helper objects, including for the streamz package (#767, #769)
  • Added VTK gallery example and other VTK enhancements (#605, #606, #715, #729)
  • Add GridBox layout (#608, #761, #763)
  • New widgets and panes:
    • Progress bar (#726)
    • Video (#696)
    • TextAreaInput widget (#658)
    • PasswordInput widget (#655)
    • Divider (#756),
    • bi-directional jslink (#764)
    • interactive DataFrame pane for Pandas, Dask and Streamz dataframes (#560, #751)

Other enhancements:

  • Make Row/Column scrollable (#760)
  • Support file-like objects (not just paths) for images (#686)
  • Added isdatetime utility (#687)
  • Added repr, kill_all_servers, and cache to pn.state (#697,#776)
  • Added Slider value_throttled parameter (#777)
  • Extended existing widgets and panes:
    • WidgetBox can be disabled programmatically (#532)
    • Templates can now render inside a notebook cell (#666)
    • Added jscallback method to Viewable objects (#665)
    • Added min_characters parameter to AutocompleteInput (#721)
    • Added accept parameter to FileInput (#602)
    • Added definition_order parameter to CrossSelector (#570)
    • Misc widget fixes and improvements (#703, #717, #724, #762, #775](holoviz#775))

Bug fixes and minor improvements:

Documentation:

Version 0.6.4

Date: 2019-10-08T17:41:51Z

This release includes a number of important bug fixes along with some minor enhancements, including contributions from @philippjfr, @jsignell, @ahuang11, @jonmmease, and @hoseppan.

Enhancements:

  • Allow pn.depends and pn.interact to accept widgets and update their output when widget values change (#639)
  • Add fancy_layout option to HoloViews pane (#543)
  • Allow not embedding local files (e.g. images) when exporting to HTML (#625)

Bug fixes and minor improvements:

Documentation:

  • Added example of opening a URL from jslink (#607)

Version 0.6.3

Date: 2019-09-19T10:28:36Z

This release saw a number of important bug and documentation fixes along with some minor enhancements.

Enhancements:

  • Added support for embedding Player widget (#584)
  • Add support for linking HoloViews plot axes across panels (#586)
  • Allow saving to BytesIO buffer (#596)
  • Allow PeriodicCallback.period to be updated dynamically (#609)

Bug fixes:

  • While hooks are applied to model no events are sent to frontend (#585)
  • Various fixes for embedding and rendering (#594)

Documentation:

  • New example of periodic callbacks (#573)
  • Improve panel serve documentation (#611, #614)
  • Add server deployment guide (#642)

Version 0.6.2

Date: 2019-08-08T15:13:31Z

Minor bugfix release patching issues with 0.6.1, primarily in the CI setup. Also removed the not-yet-supported definition_order parameter of pn.CrossSelector.

Version 0.6.1

Date: 2019-08-01T14:54:20Z

Version 0.6.0

Date: 2019-06-02T17:56:26Z

Version 0.5.1

Date: 2019-04-11T16:52:06Z

Minor release closely following up on 0.5.0 updating version requirements to include the officially released bokeh 1.1.0. This release also includes contributions from @philippjfr (with fixes for pipeline and embed features), @xavArtley (addition of a new widget) and @banesullivan (fixes for VTK support).

Features:

  • Addition of Spinner widget for numeric inputs (#368)

Bugfixes:

  • Skip jslinked widgets when using embed (#376)
  • Correctly revert changes to pipelines when stage transitions fail (#375)
  • Fixed bug handling scalar arrays in VTK pane (#372)

Version 0.5.0

Date: 2019-04-04T00:42:59Z

Major new release, greatly improving usability and capabilities. Includes contributions from @philippjfr (docs, better layouts, and many other features), @xavArtley (VTK support, Ace code editor), @banesullivan (VTK support), @jbednar and @rtmatx (docs), @jsignell (docs, infrastructure, interact support), and @jlstevens (labels for parameters).

Major new features:

  • Now uses Bokeh 1.1's greatly improved layout system, requiring far fewer manual adjustments to spacing (#32)
  • Greatly expanded docs, now with galleries (#241, #251, #265, #281, #318, #332, #347, #340)
  • Allow embedding app state, to support static HTML export of panels (#250)
  • Added new GridSpec layout type, making it simpler to make grid-based dashboards (#338)
  • Added VTK 3D object pane (#312, #337, #349, #355, #363)
  • Added Ace code editor pane (#359)
  • Allow defining external JS and CSS resources via config, making it easier to extend Panel (#330)
  • Add HTML model capable of executing JS code, allowing more complex embedded items (#326)
  • Add a KaTeX and MathJax based LaTeX pane, replacing the previous limited matplotlib/PNG-based support (#311)

Other new features:

  • Allow passing Parameter instances to Param pane, making it much simpler to work with individual parameters (#303)
  • Added parameter for widget alignment (#367)
  • Allow specifying initial value when specifying min/max/step for interact (#334)
  • Add support for param.Number step (#365)
  • Add a PeriodicCallback (#348)
  • Expose curdoc and session_context when using serve (#336)
  • Add support for saving and loading embedded data from JSON (#301)
  • Add support for specifying arbitrary label for Parameters (#290)
  • Add ColorPicker widget (#267)
  • Add support for interact title (#266)

Bugfixes and minor improvements:

Changes potentially affecting backwards compatibility:

  • Refactored io subpackage (#315)
  • Moved panes and widgets into subpackage (#283)
  • Cleaned up wdiget, deploy, and export APIs (#268, #269)
  • Renamed pane precedence to priority to avoid confusion with Param precedence (#235)

Version 0.4.0

Date: 2019-01-28T18:02:57Z

Thanks to @xavArtley for several contributions, and to @lebedov for bugfixes.

New features:

  • Now Python2 compatible (#225)
  • Audio player widget (#215,#221)
  • FileInput widget (#207)
  • General support for linking Panel objects, even in static exports (#199)
  • New user-guide notebooks: Introduction (#178), Links (#195).

Enhancements:

Bug fixes:

Version 0.3.1

Date: 2018-12-05T22:49:23Z

Minor release fixing packaging issues.

Version 0.3.0

Date: 2018-12-05T00:47:25Z

Thanks to @mhc03 for bugfixes.

New features and enhancements

  • New app: Euler's Method (#161)
  • New widgets and panes: Player (#110), DiscretePlayer (#171), CrossSelector (#153)
  • Spinner (spinner.gif)
  • Compositional string reprs (#129)
  • Add Param.widgets parameter to override default widgets (#172)
  • Pipeline improvements (#145, etc.)
  • Additional entry points for user commands (#176)
  • Support calling from anaconda-project (#133)
  • Improved docs

Bugfixes:

Compatibility changes

  • Renamed Param expand options (#127)

Version 0.1.3

Date: 2018-10-23T12:09:07Z