Ember CLI Keyboard Actions

A small mixin to make intercepting keyboard events easier to pick up and react to.

Installation

ember install:addon ember-cli-keyboard-actions

Changelog

###v0.3.0

• Added ability to add actions for chords

###v0.2.1

• Fixed issue where returning true/false from an action wouldn't alter the bubbling of the event.

###v0.2.0

• Added a catch-all 'any' range that will fire on all keypresses.
• The keyCode of the pressed key will now be passed to the handler.
• Abstracted function resolving code out to a separate class.
• Added code documentation

###v0.1.5

• Run through ESLint for stricter linting checks.

###v0.1.4

• Fixed a 'bug' causing keycode ranges to fail.

###v0.1.3

• Added ability to use a string as the action to have it resolve a function from the view.
• Added support for a-z and 0-9 as named keys.
• Added support for 'key range' events.

Importing

Simply import the mixin at the top of your component or view

import KeyboardActionsMixin from 'ember-cli-keyboard-actions/mixins/keyboard-actions'

and pass it to your component or view as you would any other mixin.

export default Ember.Component.extend(
  KeyboardActionsMixin,
  {
  }
);

Usage

Create an object on your component or view with one of the following keys to respond to the correct event:

• keyDownActions
• keyUpActions
• keyPressActions

Within this object, specific key events can be defined using either the name of the key, or the word 'key' followed by the correct keyCode.

keyDownActions: {
  backspace: function () {
    console.log('Backspace pressed');
  },
  key27: function () {
    console.log('Escape pressed');
  }
}

Alternatively, setting a string as the action will attempt to resolve the corresponding function from the view.

doSomeStuff: function () {
  console.log('Did some stuff');
},
keyDownActions: {
  backspace: 'doSomeStuff'
},

Key names currently supported:

• tab
• backspace
• enter
• capsLock
• escape
• pageUp
• pageDown
• end
• home
• left
• up
• right
• down
• insert
• delete
• space
• a - z
• 0 - 9

Actions can also be hooked in to a number of 'range' events, for instance declaring a keyDownAction 'alphanumeric' will trigger whenever an alphanumeric key is pressed.

Key ranges currently supported:

• alphanumeric (a-z, 0-9)
• alpha (a-z)
• numeric (0-9)
• any (ALL keys)

Chords / Shortcuts

A special set of actions can be defined under the key keyChordActions that can be used to assign actions to keys pressed while CTRL, ALT or SHIFT are being held down.

  keyChordActions: {
    'ctrl': {
      'a': function () {
        console.log('Ctrl + A pressed');
      }
    },
    'alt': {
      'a': function () {
        console.log('Alt + A pressed');
      }
    },
    'shift': {
      'a': function () {
        console.log('Shift + A pressed');
      }
    },
    'ctrl.alt': {
      'a': function () {
        console.log('Ctrl, Alt + A pressed');
      }
    },
    'ctrl.alt.shift': {
      'a': function () {
        console.log('Ctrl, Shift, Alt + A pressed');
      }
    }
  },

Full Example

import Ember from 'ember';
import KeyboardActionMixin from 'ember-cli-keyboard-actions/mixins/keyboard-actions.js';

export default Ember.Component.extend(
  KeyboardActionMixin,
  {
    doSomeStuff: function () {
      console.log('Did some stuff');
    },
    recogniseAlphaEvent: function () {
      console.log('Alpha event');
    },
    keyDownActions: {
      backspace: 'doSomeStuff',
      alpha: 'recogniseAlphaEvent',
      numeric: function () {
        console.log('Numeric event');
      }
    },
    keyUpActions: {
      escape: function () {
        console.log('Tab pressed on keyUp');
      }
    },
    keyPressActions: {
      key101: function () {
        console.log('Left pressed on keyPress');
      }
    }
  }
);

For more information on using ember-cli, visit http://www.ember-cli.com/.