Merge branch 'main' into ff118relnote_rtctrancev_direction

.vscode/project-words.txt

@@ -23,6 +23,7 @@ hulki
 i'gyu
 Kazotetsu
 Letorey
+mathml
 mdnplay
 menclose
 mfenced

files/en-us/_redirects.txt

@@ -9464,6 +9464,7 @@
 /en-US/docs/Web/API/RTCOfferAnswerOptions/voiceActivityDetection	/en-US/docs/Web/API/RTCPeerConnection/createAnswer
 /en-US/docs/Web/API/RTCOfferOptions	/en-US/docs/Web/API/RTCPeerConnection/createOffer
 /en-US/docs/Web/API/RTCOfferOptions/iceRestart	/en-US/docs/Web/API/RTCPeerConnection/createOffer
+/en-US/docs/Web/API/RTCOutboundRtpStreamStats/lastPacketSentTimestamp	/en-US/docs/Web/API/RTCOutboundRtpStreamStats
 /en-US/docs/Web/API/RTCOutboundRtpStreamStats/perDscpPacketsReceived	/en-US/docs/Web/API/RTCOutboundRtpStreamStats/perDscpPacketsSent
 /en-US/docs/Web/API/RTCPeerConnection.addStream	/en-US/docs/Web/API/RTCPeerConnection/addStream
 /en-US/docs/Web/API/RTCPeerConnection.close	/en-US/docs/Web/API/RTCPeerConnection/close

files/en-us/_wikihistory.json

@@ -54608,10 +54608,6 @@
     "modified": "2020-10-15T22:17:15.823Z",
     "contributors": ["Sheppy"]
   },
-  "Web/API/RTCOutboundRtpStreamStats/lastPacketSentTimestamp": {
-    "modified": "2020-10-15T22:17:16.317Z",
-    "contributors": ["Sheppy"]
-  },
   "Web/API/RTCOutboundRtpStreamStats/nackCount": {
     "modified": "2020-10-15T22:17:14.809Z",
     "contributors": ["Sheppy"]

files/en-us/glossary/asynchronous/index.md

@@ -6,21 +6,23 @@ page-type: glossary-definition
 
 {{GlossarySidebar}}
 
-The term **asynchronous** refers to two or more objects or events **not** existing or happening at the same time (or multiple related things happening without waiting for the previous one to complete). In computing, the word "asynchronous" is used in two major contexts.
+The term **asynchronous** refers to two or more objects or events that do not exist or happen at the same time, that is, they are **not** {{glossary("synchronous")}} . When multiple related things happen without any being dependent on the completion of previous happenings, they are asynchronous.
 
-- Networking and communications
+In computing, the word "asynchronous" is used in two major contexts, as explained below.
 
-  - : Asynchronous communication is a method of exchanging messages between two or more parties in which each party receives and processes messages whenever it's convenient or possible to do so, rather than doing so immediately upon receipt. Additionally, messages may be sent without waiting for acknowledgement, with the understanding that if a problem occurs, the recipient will request corrections or otherwise handle the situation.
+## In networking and communications
 
-    For humans, email is an asynchronous communication method; the sender sends an email and the recipient will read and reply to the message when it's convenient to do so, rather than doing so at once. And both sides can continue to send and receive messages whenever they wish, instead of having to schedule them around each other.
+Asynchronous communication is a method of exchanging messages in which the sending, receiving, and processing of each message is not dependent on the sending, receipt, or processing of other messages. In asynchronous communication, each party receives and processes messages when convenient or possible to do so, rather than doing so immediately upon receipt. Additionally, messages may be sent without waiting for acknowledgement, with the understanding that if a problem occurs, the recipient will request corrections or otherwise handle the situation.
 
-    When software communicates asynchronously, a program may make a request for information from another piece of software (such as a server), and continue to do other things while waiting for a reply. For example, the [AJAX](/en-US/docs/Web/Guide/AJAX) (Asynchronous JavaScript and {{Glossary("XML")}}) programming technique—now usually "Ajax", even though {{Glossary("JSON")}} is usually used rather than XML in modern applications—is a mechanism that requests relatively small amounts of data from the server using {{Glossary("HTTP")}}, with the result being returned when available rather than immediately.
+Email is a type of asynchronous human communication. A sender sends an email. The recipient reads the email and responds to it (or not) at their convenience, not necessarily right away. All parties can continue to send and receive messages at any time. Emails don't have to be scheduled in a particular sequence.
 
-- Software design
+In asynchronous software, making a request, such as to a server, does not block other processes while waiting for the response. The software can continue performing other tasks. For example, in [promise-based APIs](/en-US/docs/Learn/JavaScript/Asynchronous/Implementing_a_promise-based_API), {{JSxRef("Promise")}} objects are created for long operations. After the operation is complete, the promise is handled. With promises, the software doesn't have to wait for the operation to finish.
 
-  - : Asynchronous software design expands upon the concept by building code that allows a program to ask that a task be performed alongside the original task (or tasks), without stopping to wait for the task to complete. When the secondary task is completed, the original task is notified using an agreed-upon mechanism so that it knows the work is done, and that the result, if any, is available.
+## In software design
 
-    There are a number of programming techniques for implementing asynchronous software. See the article [Asynchronous JavaScript](/en-US/docs/Learn/JavaScript/Asynchronous) for an introduction to them.
+Asynchronous software design expands upon the concept by building code that allows a program to ask that a task be performed alongside the original task (or tasks), without stopping to wait for the task to complete. When the secondary task is completed, the original task is notified using an agreed-upon mechanism so that it knows the work is done, and that the result, if any, is available.
+
+There are a number of programming techniques for implementing asynchronous software. See the article [Asynchronous JavaScript](/en-US/docs/Learn/JavaScript/Asynchronous) for an introduction to them.
 
 ## See also
 

files/en-us/glossary/rgb/index.md

@@ -10,11 +10,11 @@ _Red-Green-Blue_ (**RGB**) is a color model that represents colors as mixtures o
 
 Alone an RGB value has no meaning. A color model defines how the three components relate to a color space. Graphically, a point in a three-dimensional grid or cube represents a color. Each dimension (or axis) corresponds to a different channel. The RGB color model is then a _cubic_, or _Cartesian_, coordinate system of the underlying color space.
 
-For the web, the underlying color space for an RGB value is _sRGB_ (Standard RGB), and each RGB component is a number between 0 and 255. Float values are supported.
+For the web, the underlying color space for an RGB value is _sRGB_ (Standard RGB), and each RGB component is a number between 0 and 255.
 
 Note that there are other RGB color spaces, like the _Adobe RGB_ color space, that can represent a wider {{glossary("gamut")}} of color than the _sRGB_ color space. The coordinates in _sRGB_ and _Adobe RGB_ are different.
 
-There are many ways to describe the RGB components of a color. In {{Glossary("CSS")}} they can be represented as a single 24-bit integer in hexadecimal notation (for example, `#add8e6` is light blue), or in functional notation, [`rgb()`](/en-US/docs/Web/CSS/color_value/rgb) as three separate floats between 0 and 255 (for example, `rgb(46 139.5 87)`). In {{Glossary("OpenGL")}}, {{Glossary("WebGL")}}, and {{Glossary("GLSL")}} the red-green-blue components are fractions (floating-point numbers between 0.0 and 1.0), although in the actual color buffer they are typically stored as 8-bit integers.
+There are many ways to describe the RGB components of a color. In {{Glossary("CSS")}} they can be represented as a single 24-bit integer in hexadecimal notation (for example, `#add8e6` is light blue), or in functional notation, [`rgb()`](/en-US/docs/Web/CSS/color_value/rgb) as three separate numbers between 0 and 255 (for example, `rgb(46 139.5 87)`). There are also the `srgb`, `srgb-linear`, `a98-rgb`, and `prophoto-rgb` color spaces for the [`color()`](/en-US/docs/Web/CSS/color_value/color) function.
 
 RGB is not the only color model that can represent the _sRGB_ color space. Cylindrical coordinate systems like the [`HSL`](/en-US/docs/Web/CSS/color_value/hsl) (_hue-saturation-lightness_) or [`HWB`](/en-US/docs/Web/CSS/color_value/hwb) (_hue-whiteness-blackness_) color models are also used to represent a sRGB color on the web.
 

files/en-us/glossary/submit_button/index.md

@@ -18,11 +18,11 @@ In addition to submitting a form, a submit button can affect the form's behavior
 
 Submit buttons can override the form's submission behavior through various attributes:
 
-- `{{HtmlElement("button#attr-formaction", "formaction")}}`: Override the [`action`](/en-US/docs/Web/HTML/Element/form#action) attribute of the form.
-- `{{HtmlElement("button#attr-formenctype", "formenctype")}}`: Override the [`enctype`](/en-US/docs/Web/HTML/Element/form#enctype) attribute of the form.
-- `{{HtmlElement("button#attr-formmethod", "formmethod")}}`: Override the [`method`](/en-US/docs/Web/HTML/Element/form#method) attribute of the form.
-- `{{HtmlElement("button#attr-formnovalidate", "formnovalidate")}}`: Override the [`novalidate`](/en-US/docs/Web/HTML/Element/form#novalidate) attribute of the form.
-- `{{HtmlElement("button#attr-formtarget", "formtarget")}}`: Override the [`target`](/en-US/docs/Web/HTML/Element/form#target) attribute of the form.
+- `{{HtmlElement("button#formaction", "formaction")}}`: Override the [`action`](/en-US/docs/Web/HTML/Element/form#action) attribute of the form.
+- `{{HtmlElement("button#formenctype", "formenctype")}}`: Override the [`enctype`](/en-US/docs/Web/HTML/Element/form#enctype) attribute of the form.
+- `{{HtmlElement("button#formmethod", "formmethod")}}`: Override the [`method`](/en-US/docs/Web/HTML/Element/form#method) attribute of the form.
+- `{{HtmlElement("button#formnovalidate", "formnovalidate")}}`: Override the [`novalidate`](/en-US/docs/Web/HTML/Element/form#novalidate) attribute of the form.
+- `{{HtmlElement("button#formtarget", "formtarget")}}`: Override the [`target`](/en-US/docs/Web/HTML/Element/form#target) attribute of the form.
 
 ## Form data entries
 

files/en-us/glossary/top_layer/index.md

@@ -20,11 +20,12 @@ Some browsers, such as Chrome, show elements placed in the top layer inside a sp
 
 ![An element in the top layer, as shown in the chrome devtools](top_layer_devtools.png)
 
-Bear in mind however that the top layer is an internal browser concept, and cannot be directly manipulated from code. You can target elements placed in the top layer using CSS and JavaScript, but you cannot target the top layer itself.
+Note that the top layer is an internal browser concept and cannot be directly manipulated from code. You can target elements placed in the top layer using CSS and JavaScript, but you cannot target the top layer itself.
 
 ## See also
 
 - [The stacking context](/en-US/docs/Web/CSS/CSS_positioned_layout/Understanding_z-index/Stacking_context)
 - [Fullscreen API](/en-US/docs/Web/API/Fullscreen_API)
 - {{htmlelement("dialog")}} element, {{domxref("HTMLDialogElement")}} interface
 - [Popover API](/en-US/docs/Web/API/Popover_API)
+- {{CSSXref(":fullscreen")}} pseudo-class