README.md
# KeyCode Constants
[](https://www.npmjs.com/package/keycode-js)
[](https://deno.land/x/keycode/README.md#usagewithdeno)
[](https://travis-ci.org/kabirbaidhya/keycode-js)
[](https://lgtm.com/projects/g/kabirbaidhya/keycode-js/context:javascript)
[](https://www.npmjs.com/package/keycode-js)
[](#contributing)
[](LICENSE)
A minimal JavaScript package with key code constants.
## Installation
```bash
# Using npm
$ npm install keycode-js --save
# Using yarn
$ yarn add keycode-js
# Using bower
$ bower install keycode-js --save
```
## Usage
Import the package using `require()` or ES / TypeScript `import` statement:
```js
// CommonJS
const KeyCode = require('keycode-js');
// ES2015+
import * as KeyCode from 'keycode-js';
// TypeScript
import * as KeyCode from 'keycode-js';
// Import individual constants
import { KEY_RETURN } from 'keycode-js';
```
Or, using `<script>` tag:
```html
<script src="https://unpkg.com/keycode-js@3.1.0/dist/keycode.min.js"></script>
```
Finally:
```js
window.addEventListener('keyup', function(e) {
// You may do one of these checks.
// Check the code value.
if (e.code === KeyCode.CODE_RETURN) {
console.log('It was the Return key.');
return;
}
// OR, check the keyCode value.
if (e.keyCode === KeyCode.KEY_RETURN) {
console.log('It was the Return key.');
return;
}
// OR, check the key value.
if (e.key === KeyCode.VALUE_RETURN) {
console.log('It was the Return key.');
return;
}
console.log('It was any other key.');
});
```
## Usage with Deno
```ts
// Import all constants
import * as KeyCode from 'https://deno.land/x/keycode@v3.1.0/mod.ts';
// Import individual constants
import { KEY_ENTER } from 'https://deno.land/x/keycode@v3.1.0/mod.ts';
console.assert(KeyCode.KEY_ENTER === KEY_ENTER);
```
## Available Constants
### 1. Key event code constants
List of available constants that corresponds to the browser's [`KeyboardEvent.code`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code) attribute.
[[Reference](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code/code_values)]
**Example usage**
```js
window.addEventListener('keyup', function(e) {
console.log('Enter Key:', (e.code === KeyCode.CODE_RETURN));
});
```
**List**
| Key Name | Constant | Value |
|------------------------|----------------------------|--------------------|
| (Undefined) | CODE_UNIDENTIFIED | `"Unidentified"` |
| Escape | CODE_ESCAPE | `"Escape"` |
| Dash / Minus | CODE_MINUS<br/>CODE_DASH | `"Minus"` |
| Equals | CODE_EQUALS | `"Equal"` |
| Backspace | CODE_BACK_SPACE | `"Backspace"` |
| Tab | CODE_TAB | `"Tab"` |
| Return | CODE_ENTER<br/>CODE_RETURN | `"Enter"` |
| Shift (Left) | CODE_SHIFT_LEFT | `"ShiftLeft"` |
| Shift (Right) | CODE_SHIFT_RIGHT | `"ShiftRight"` |
| Control (Left) | CODE_CONTROL_LEFT | `"ControlLeft"` |
| Control (Right) | CODE_CONTROL_RIGHT | `"ControlRight"` |
| Alt (Left) | CODE_ALT_LEFT | `"AltLeft"` |
| Alt (Right) | CODE_ALT_RIGHT | `"AltRight"` |
| Pause | CODE_PAUSE | `"Pause"` |
| Caps Lock | CODE_CAPS_LOCK | `"CapsLock"` |
| Space | CODE_SPACE | `"Space"` |
| Page Up | CODE_PAGE_UP | `"PageUp"` |
| Page Down | CODE_PAGE_DOWN | `"PageDown"` |
| End | CODE_END | `"End"` |
| Home | CODE_HOME | `"Home"` |
| Left | CODE_LEFT | `"ArrowLeft"` |
| Up | CODE_UP | `"ArrowUp"` |
| Right | CODE_RIGHT | `"ArrowRight"` |
| Down | CODE_DOWN | `"ArrowDown"` |
| Print Screen | CODE_PRINTSCREEN | `"PrintScreen"` |
| Insert | CODE_INSERT | `"Insert"` |
| Delete | CODE_DELETE | `"Delete"` |
| 0 | CODE_0 | `"Digit0"` |
| 1 | CODE_1 | `"Digit1"` |
| 2 | CODE_2 | `"Digit2"` |
| 3 | CODE_3 | `"Digit3"` |
| 4 | CODE_4 | `"Digit4"` |
| 5 | CODE_5 | `"Digit5"` |
| 6 | CODE_6 | `"Digit6"` |
| 7 | CODE_7 | `"Digit7"` |
| 8 | CODE_8 | `"Digit8"` |
| 9 | CODE_9 | `"Digit9"` |
| A | CODE_A | `"KeyA"` |
| B | CODE_B | `"KeyB"` |
| C | CODE_C | `"KeyC"` |
| D | CODE_D | `"KeyD"` |
| E | CODE_E | `"KeyE"` |
| F | CODE_F | `"KeyF"` |
| G | CODE_G | `"KeyG"` |
| H | CODE_H | `"KeyH"` |
| I | CODE_I | `"KeyI"` |
| J | CODE_J | `"KeyJ"` |
| K | CODE_K | `"KeyK"` |
| L | CODE_L | `"KeyL"` |
| M | CODE_M | `"KeyM"` |
| N | CODE_N | `"KeyN"` |
| O | CODE_O | `"KeyO"` |
| P | CODE_P | `"KeyP"` |
| Q | CODE_Q | `"KeyQ"` |
| R | CODE_R | `"KeyR"` |
| S | CODE_S | `"KeyS"` |
| T | CODE_T | `"KeyT"` |
| U | CODE_U | `"KeyU"` |
| V | CODE_V | `"KeyV"` |
| W | CODE_W | `"KeyW"` |
| X | CODE_X | `"KeyX"` |
| Y | CODE_Y | `"KeyY"` |
| Z | CODE_Z | `"KeyZ"` |
| Cmd ⌘ / Window (Left) | CODE_META_LEFT | `"MetaLeft"` |
| Cmd ⌘ / Window (Left) | CODE_OS_LEFT | `"OSLeft"` |
| Cmd ⌘ / Window (Right) | CODE_META_RIGHT | `"MetaRight"` |
| Cmd ⌘ / Window (Right) | CODE_OS_RIGHT | `"OSRight"` |
| Context Menu | CODE_CONTEXT_MENU | `"ContextMenu"` |
| Numpad 0 | CODE_NUMPAD0 | `"Numpad0"` |
| Numpad 1 | CODE_NUMPAD1 | `"Numpad1"` |
| Numpad 2 | CODE_NUMPAD2 | `"Numpad2"` |
| Numpad 3 | CODE_NUMPAD3 | `"Numpad3"` |
| Numpad 4 | CODE_NUMPAD4 | `"Numpad4"` |
| Numpad 5 | CODE_NUMPAD5 | `"Numpad5"` |
| Numpad 6 | CODE_NUMPAD6 | `"Numpad6"` |
| Numpad 7 | CODE_NUMPAD7 | `"Numpad7"` |
| Numpad 8 | CODE_NUMPAD8 | `"Numpad8"` |
| Numpad 9 | CODE_NUMPAD9 | `"Numpad9"` |
| Multiply | CODE_NUMPAD_MULTIPLY | `"NumpadMultiply"` |
| Add | CODE_NUMPAD_ADD | `"NumpadAdd"` |
| Subtract | CODE_NUMPAD_SUBTRACT | `"NumpadSubtract"` |
| Decimal | CODE_NUMPAD_DECIMAL | `"NumpadDecimal"` |
| Divide | CODE_NUMPAD_DIVIDE | `"NumpadDivide"` |
| Numpad Enter | CODE_NUMPAD_ENTER | `"NumpadEnter"` |
| F1 | CODE_F1 | `"F1"` |
| F2 | CODE_F2 | `"F2"` |
| F3 | CODE_F3 | `"F3"` |
| F4 | CODE_F4 | `"F4"` |
| F5 | CODE_F5 | `"F5"` |
| F6 | CODE_F6 | `"F6"` |
| F7 | CODE_F7 | `"F7"` |
| F8 | CODE_F8 | `"F8"` |
| F9 | CODE_F9 | `"F9"` |
| F10 | CODE_F10 | `"F10"` |
| F11 | CODE_F11 | `"F11"` |
| F12 | CODE_F12 | `"F12"` |
| F13 | CODE_F13 | `"F13"` |
| F14 | CODE_F14 | `"F14"` |
| F15 | CODE_F15 | `"F15"` |
| F16 | CODE_F16 | `"F16"` |
| F17 | CODE_F17 | `"F17"` |
| F18 | CODE_F18 | `"F18"` |
| F19 | CODE_F19 | `"F19"` |
| F20 | CODE_F20 | `"F20"` |
| F21 | CODE_F21 | `"F21"` |
| F22 | CODE_F22 | `"F22"` |
| F23 | CODE_F23 | `"F23"` |
| F24 | CODE_F24 | `"F24"` |
| Num Lock | CODE_NUM_LOCK | `"NumLock"` |
| Scroll Lock | CODE_SCROLL_LOCK | `"ScrollLock"` |
| Semicolon | CODE_SEMICOLON | `"Semicolon"` |
| Comma | CODE_COMMA | `"Comma"` |
| Period | CODE_PERIOD | `"Period"` |
| Slash | CODE_SLASH | `"Slash"` |
| Back Quote | CODE_BACK_QUOTE | `"Backquote"` |
| Open Bracket | CODE_OPEN_BRACKET | `"BracketLeft"` |
| Back Slash | CODE_BACK_SLASH | `"Backslash"` |
| Close Bracket | CODE_CLOSE_BRACKET | `"BracketRight"` |
| Quote | CODE_QUOTE | `"Quote"` |
### 2. Key code constants (numeric)
List of available numeric constants that corresponds to the browser's [`KeyboardEvent.keyCode`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode) attribute.
[[Reference](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode#Constants_for_keyCode_value)]
**Example usage**
```js
window.addEventListener('keyup', function(e) {
console.log('Enter Key:', (e.keyCode === KeyCode.KEY_RETURN));
});
```
**List**
| Key Name | Constant | Value |
| --------------------- | ----------------------- | ----- |
| Cancel | KEY_CANCEL | 3 |
| Help | KEY_HELP | 6 |
| Backspace | KEY_BACK_SPACE | 8 |
| Tab | KEY_TAB | 9 |
| Clear | KEY_CLEAR | 12 |
| Return | KEY_RETURN | 13 |
| Enter (Firefox) | KEY_FIREFOX_ENTER | 14 |
| Shift | KEY_SHIFT | 16 |
| Control | KEY_CONTROL | 17 |
| Alt | KEY_ALT | 18 |
| Pause | KEY_PAUSE | 19 |
| Caps Lock | KEY_CAPS_LOCK | 20 |
| Escape | KEY_ESCAPE | 27 |
| Space | KEY_SPACE | 32 |
| Page up | KEY_PAGE_UP | 33 |
| Page down | KEY_PAGE_DOWN | 34 |
| End | KEY_END | 35 |
| Home | KEY_HOME | 36 |
| Left | KEY_LEFT | 37 |
| Up | KEY_UP | 38 |
| Right | KEY_RIGHT | 39 |
| Down | KEY_DOWN | 40 |
| Print Screen | KEY_PRINTSCREEN | 44 |
| Insert | KEY_INSERT | 45 |
| Delete | KEY_DELETE | 46 |
| 0 | KEY_0 | 48 |
| 1 | KEY_1 | 49 |
| 2 | KEY_2 | 50 |
| 3 | KEY_3 | 51 |
| 4 | KEY_4 | 52 |
| 5 | KEY_5 | 53 |
| 6 | KEY_6 | 54 |
| 7 | KEY_7 | 55 |
| 8 | KEY_8 | 56 |
| 9 | KEY_9 | 57 |
| Semicolon (Firefox) | KEY_FIREFOX_SEMICOLON | 59 |
| Equals (Firefox) | KEY_FIREFOX_EQUALS | 61 |
| A | KEY_A | 65 |
| B | KEY_B | 66 |
| C | KEY_C | 67 |
| D | KEY_D | 68 |
| E | KEY_E | 69 |
| F | KEY_F | 70 |
| G | KEY_G | 71 |
| H | KEY_H | 72 |
| I | KEY_I | 73 |
| J | KEY_J | 74 |
| K | KEY_K | 75 |
| L | KEY_L | 76 |
| M | KEY_M | 77 |
| N | KEY_N | 78 |
| O | KEY_O | 79 |
| P | KEY_P | 80 |
| Q | KEY_Q | 81 |
| R | KEY_R | 82 |
| S | KEY_S | 83 |
| T | KEY_T | 84 |
| U | KEY_U | 85 |
| V | KEY_V | 86 |
| W | KEY_W | 87 |
| X | KEY_X | 88 |
| Y | KEY_Y | 89 |
| Z | KEY_Z | 90 |
| Left ⌘ / Window | KEY_LEFT_CMD | 91 |
| Right ⌘ / Window | KEY_RIGHT_CMD | 92 |
| Context Menu | KEY_CONTEXT_MENU | 93 |
| Numpad 0 | KEY_NUMPAD0 | 96 |
| Numpad 1 | KEY_NUMPAD1 | 97 |
| Numpad 2 | KEY_NUMPAD2 | 98 |
| Numpad 3 | KEY_NUMPAD3 | 99 |
| Numpad 4 | KEY_NUMPAD4 | 100 |
| Numpad 5 | KEY_NUMPAD5 | 101 |
| Numpad 6 | KEY_NUMPAD6 | 102 |
| Numpad 7 | KEY_NUMPAD7 | 103 |
| Numpad 8 | KEY_NUMPAD8 | 104 |
| Numpad 9 | KEY_NUMPAD9 | 105 |
| Multiply | KEY_MULTIPLY | 106 |
| Add | KEY_ADD | 107 |
| Separator (Firefox) | KEY_FIREFOX_SEPARATOR | 108 |
| Subtract | KEY_SUBTRACT | 109 |
| Decimal | KEY_DECIMAL | 110 |
| Divide | KEY_DIVIDE | 111 |
| F1 | KEY_F1 | 112 |
| F2 | KEY_F2 | 113 |
| F3 | KEY_F3 | 114 |
| F4 | KEY_F4 | 115 |
| F5 | KEY_F5 | 116 |
| F6 | KEY_F6 | 117 |
| F7 | KEY_F7 | 118 |
| F8 | KEY_F8 | 119 |
| F9 | KEY_F9 | 120 |
| F10 | KEY_F10 | 121 |
| F11 | KEY_F11 | 122 |
| F12 | KEY_F12 | 123 |
| F13 | KEY_F13 | 124 |
| F14 | KEY_F14 | 125 |
| F15 | KEY_F15 | 126 |
| F16 | KEY_F16 | 127 |
| F17 | KEY_F17 | 128 |
| F18 | KEY_F18 | 129 |
| F19 | KEY_F19 | 130 |
| F20 | KEY_F20 | 131 |
| F21 | KEY_F21 | 132 |
| F22 | KEY_F22 | 133 |
| F23 | KEY_F23 | 134 |
| F24 | KEY_F24 | 135 |
| Num Lock | KEY_NUM_LOCK | 144 |
| Scroll Lock | KEY_SCROLL_LOCK | 145 |
| Semicolon | KEY_SEMICOLON | 186 |
| Equals | KEY_EQUALS | 187 |
| Comma | KEY_COMMA | 188 |
| Dash | KEY_DASH | 189 |
| Period | KEY_PERIOD | 190 |
| Slash | KEY_SLASH | 191 |
| Back Quote | KEY_BACK_QUOTE | 192 |
| Open Bracket | KEY_OPEN_BRACKET | 219 |
| Back Slash | KEY_BACK_SLASH | 220 |
| Close Bracket | KEY_CLOSE_BRACKET | 221 |
| Quote | KEY_QUOTE | 222 |
| Meta (Firefox) | KEY_FIREFOX_META | 224 |
### 3. Key value constants
List of available constants that corresponds to the browser's [`KeyboardEvent.key`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key) attribute.
**Example usage**
```js
window.addEventListener('keyup', function(e) {
console.log('Enter Key:', (e.key === KeyCode.VALUE_RETURN));
});
```
**List**
| Key Name | Constant | Value |
|----------------|---------------------------------------------------|-----------------|
| Cancel | VALUE_CANCEL | `"Cancel"` |
| Help | VALUE_HELP | `"Help"` |
| Backspace | VALUE_BACK_SPACE | `"Backspace"` |
| Tab | VALUE_TAB | `"Tab"` |
| Clear | VALUE_CLEAR | `"Clear"` |
| Return | VALUE_ENTER <br/> VALUE_RETURN | `"Enter"` |
| Shift | VALUE_SHIFT | `"Shift"` |
| Control | VALUE_CONTROL | `"Control"` |
| Alt | VALUE_ALT | `"Alt"` |
| Pause | VALUE_PAUSE | `"Pause"` |
| Caps Lock | VALUE_CAPS_LOCK | `"CapsLock"` |
| Escape | VALUE_ESCAPE | `"Escape"` |
| Space | VALUE_SPACE | `" "` |
| Page up | VALUE_PAGE_UP | `"PageUp"` |
| Page down | VALUE_PAGE_DOWN | `"PageDown"` |
| End | VALUE_END | `"End"` |
| Home | VALUE_HOME | `"Home"` |
| Left | VALUE_LEFT | `"ArrowLeft"` |
| Up | VALUE_UP | `"ArrowUp"` |
| Right | VALUE_RIGHT | `"ArrowRight"` |
| Down | VALUE_DOWN | `"ArrowDown"` |
| Print Screen | VALUE_PRINTSCREEN | `"PrintScreen"` |
| Insert | VALUE_INSERT | `"Insert"` |
| Delete | VALUE_DELETE | `"Delete"` |
| 0 | VALUE_0 | `"0"` |
| 1 | VALUE_1 | `"1"` |
| 2 | VALUE_2 | `"2"` |
| 3 | VALUE_3 | `"3"` |
| 4 | VALUE_4 | `"4"` |
| 5 | VALUE_5 | `"5"` |
| 6 | VALUE_6 | `"6"` |
| 7 | VALUE_7 | `"7"` |
| 8 | VALUE_8 | `"8"` |
| 9 | VALUE_9 | `"9"` |
| A | VALUE_A | `"a"` |
| B | VALUE_B | `"b"` |
| C | VALUE_C | `"c"` |
| D | VALUE_D | `"d"` |
| E | VALUE_E | `"e"` |
| F | VALUE_F | `"f"` |
| G | VALUE_G | `"g"` |
| H | VALUE_H | `"h"` |
| I | VALUE_I | `"i"` |
| J | VALUE_J | `"j"` |
| K | VALUE_K | `"k"` |
| L | VALUE_L | `"l"` |
| M | VALUE_M | `"m"` |
| N | VALUE_N | `"n"` |
| O | VALUE_O | `"o"` |
| P | VALUE_P | `"p"` |
| Q | VALUE_Q | `"q"` |
| R | VALUE_R | `"r"` |
| S | VALUE_S | `"s"` |
| T | VALUE_T | `"t"` |
| U | VALUE_U | `"u"` |
| V | VALUE_V | `"v"` |
| W | VALUE_W | `"w"` |
| X | VALUE_X | `"x"` |
| Y | VALUE_Y | `"y"` |
| Z | VALUE_Z | `"z"` |
| Cmd ⌘ / Window | VALUE_META<br/>VALUE_LEFT_CMD<br/>VALUE_RIGHT_CMD | `"Meta"` |
| Context Menu | VALUE_CONTEXT_MENU | `"ContextMenu"` |
| Numpad 0 | VALUE_NUMPAD0 | `"0"` |
| Numpad 1 | VALUE_NUMPAD1 | `"1"` |
| Numpad 2 | VALUE_NUMPAD2 | `"2"` |
| Numpad 3 | VALUE_NUMPAD3 | `"3"` |
| Numpad 4 | VALUE_NUMPAD4 | `"4"` |
| Numpad 5 | VALUE_NUMPAD5 | `"5"` |
| Numpad 6 | VALUE_NUMPAD6 | `"6"` |
| Numpad 7 | VALUE_NUMPAD7 | `"7"` |
| Numpad 8 | VALUE_NUMPAD8 | `"8"` |
| Numpad 9 | VALUE_NUMPAD9 | `"9"` |
| Multiply | VALUE_MULTIPLY | `"*"` |
| Add | VALUE_ADD | `"+"` |
| Subtract | VALUE_SUBTRACT | `"-"` |
| Decimal | VALUE_DECIMAL | `"."` |
| Divide | VALUE_DIVIDE | `"/"` |
| F1 | VALUE_F1 | `"F1"` |
| F2 | VALUE_F2 | `"F2"` |
| F3 | VALUE_F3 | `"F3"` |
| F4 | VALUE_F4 | `"F4"` |
| F5 | VALUE_F5 | `"F5"` |
| F6 | VALUE_F6 | `"F6"` |
| F7 | VALUE_F7 | `"F7"` |
| F8 | VALUE_F8 | `"F8"` |
| F9 | VALUE_F9 | `"F9"` |
| F10 | VALUE_F10 | `"F10"` |
| F11 | VALUE_F11 | `"F11"` |
| F12 | VALUE_F12 | `"F12"` |
| F13 | VALUE_F13 | `"F13"` |
| F14 | VALUE_F14 | `"F14"` |
| F15 | VALUE_F15 | `"F15"` |
| F16 | VALUE_F16 | `"F16"` |
| F17 | VALUE_F17 | `"F17"` |
| F18 | VALUE_F18 | `"F18"` |
| F19 | VALUE_F19 | `"F19"` |
| F20 | VALUE_F20 | `"F20"` |
| F21 | VALUE_F21 | `"F21"` |
| F22 | VALUE_F22 | `"F22"` |
| F23 | VALUE_F23 | `"F23"` |
| F24 | VALUE_F24 | `"F24"` |
| Num Lock | VALUE_NUM_LOCK | `"NumLock"` |
| Scroll Lock | VALUE_SCROLL_LOCK | `"ScrollLock"` |
| Semicolon | VALUE_SEMICOLON | `";"` |
| Equals | VALUE_EQUALS | `"="` |
| Comma | VALUE_COMMA | `","` |
| Dash | VALUE_DASH | `"-"` |
| Period | VALUE_PERIOD | `"."` |
| Slash | VALUE_SLASH | `"/"` |
| Back Quote | VALUE_BACK_QUOTE | ``"`"`` |
| Open Bracket | VALUE_OPEN_BRACKET | `"("` |
| Back Slash | VALUE_BACK_SLASH | `"\"` |
| Close Bracket | VALUE_CLOSE_BRACKET | `")"` |
| Quote | VALUE_QUOTE | `"'"` |
## Contributing
All kinds of contributions are welcome. Please feel free to propose PRs, report issues and suggestions to improve.
## Changelog
Check the [CHANGELOG](CHANGELOG.md) for full release history.
## Maintainers
- [Kabir Baidhya](https://github.com/kabirbaidhya)
- [Saugat Acharya](https://github.com/mesaugat)
## License
This package is licensed under the [MIT License](LICENSE).