jQuery Virtual Keyboard Plugin - Keyboard

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License: MIT
   
jQuery Virtual Keyboard Plugin - Keyboard

Keyboard is a jQuery plugin built with jQuery UI that adds an onscreen virtual Keyboard to your project , which will popup when a specified entry field is focused. It is mobile ready and also can be used as a Scientific Calculator.

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Table Of Contents:

Installation:

# NPM
$ npm install virtual-keyboard

# Bower
$ bower install virtual-keyboard

Basic Usage:

1. Include jQuery library and the jQuery Keyboard plugin's files on the page.

<!-- Core Stylesheet -->
<link href="css/keyboard.css" rel="stylesheet" />
<!-- Light Theme -->
<link href="css/keyboard-basic.css" rel="stylesheet" />
<!-- Dark Theme -->
<link href="css/keyboard-dark.css" rel="stylesheet" />
<!-- CSS for the preview keyset extension -->
<link href="css/keyboard-previewkeyset.css" rel="stylesheet" />
<!-- jQuery Is Required -->
<script src="/path/to/cdn/jquery.min.js"></script>
<!-- Core JavaScript -->
<script src="js/jquery.keyboard.js"></script>
<!-- With All Extensions -->
<script src="js/jquery.keyboard.extension-all.js"></script>

2. Include other optional resources as per your needs.

<!-- jQuery UI Themes -->
<script src="/path/to/cdn/jquery-ui.min.js"></script>
<link rel="stylesheet" href="/path/to/cdn/jquery-ui.min.css" />

<!-- Or Bootstrap Theme -->
<link rel="stylesheet" href="/path/to/cdn/bootstrap.min.css" />

<!-- Mousewheel support -->
<script src="/path/to/jquery.mousewheel.js"></script>

3. Include Keyboard plugin's extensions if needed.

<!-- Show alternate keys in a popup -->
<script src="js/jquery.keyboard.extension-altkeypopup.js"></script>
<!-- Integrate with jQuery UI's autocomplete widget -->
<script src="js/jquery.keyboard.extension-autocomplete.js"></script>
<!-- Add a caret with custom styling -->
<script src="js/jquery.keyboard.extension-caret.js"></script>
<!-- Add a togglable layout -->
<script src="js/jquery.keyboard.extension-extender.js"></script>
<!-- Use with jQuery Mobile & jQuery Mobile -->
<script src="js/jquery.keyboard.extension-mobile.js"></script>
<!-- Use arrow, home, end & page up/down to navigate inside of the keyboard -->
<script src="js/jquery.keyboard.extension-navigation.js"></script>
<!-- Add a preview of chosen keysets; display & position of the preview is accomplished through css -->
<script src="js/jquery.keyboard.extension-previewkeyset.js"></script>
<!-- Scramble the entire keyset or by row, once or every time the keyboard is opened for added security -->
<script src="js/jquery.keyboard.extension-scramble.js"></script>
<!-- Allows you to simulate typing into the keyboard for demo purposes or to assist user input -->
<script src="js/jquery.keyboard.extension-typing.js"></script>

4. Attach the virtual keyboard to your element like textarea, input field, or contentEditable element.

<input id="keyboard" type="text">
$(function(){
  $('#keyboard').keyboard({
    // options here
  });
});

5. Available options to customize the virtual keyboard.

// set this to ISO 639-1 language code to override language set by the layout
// http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
// language defaults to 'en' if not found
language: null,

// RTL or LTR
rtl: false,

// 'alpha' - Alphabetical layout.
// 'colemak' - Colemak layout.
// 'custom' - Uses a custom layout as defined by the customLayout option.
// 'dvorak' - Dvorak Simplified layout.
// 'international' - Standard US-international QWERTY layout.
// 'num' - Numerical (ten-key) layout.
// 'numpad' - Numerical layout with left & right caret keys (added by extender extension).
// 'qwerty' - Standard U.S. QWERTY layout.
// or 'custom'. see below
layout: 'qwerty',

// custom layout
// {
//   'normal' : ['a b c d e', 'f g h i j', '{shift} {meta1} {a} {c}'],
//   'shift'  : ['A B C D E', 'F G H I J', '{shift} {meta1} {a} {c}'],
//   'meta1'  : ['1 2 3 4 5', '6 7 8 9 0', '{shift} {meta1} {a} {c}']
// }
customLayout: null,

position: {
  // optional - null (attach to input/textarea) or a jQuery object (attach elsewhere)
  of: null,
  my: 'center top',
  at: 'center top',
  // used when 'usePreview' is false (centers the keyboard at the bottom of the input/textarea)
  at2: 'center bottom'
},

// allow jQuery position utility to reposition the keyboard on window resize
reposition: true,

// preview added above keyboard if true, original input/textarea used if false
usePreview: true,

// if true, the keyboard will always be visible
alwaysOpen: false,

// give the preview initial focus when the keyboard becomes visible
initialFocus: true,

// avoid changing the focus (hardware keyboard probably won't work)
noFocus: false,

// if true, keyboard will remain open even if the input loses focus, but closes on escape
// or when another keyboard opens.
stayOpen: false,

// Prevents the keyboard from closing when the user clicks or presses outside the keyboard
// the `autoAccept` option must also be set to true when this option is true or changes are lost
userClosed: false,

// if true, keyboard will not close if you press escape.
ignoreEsc: false,

// if true, keyboard will only closed on click event instead of mousedown and touchstart
closeByClickEvent: false,

css: {
  // input & preview
  input: 'ui-widget-content ui-corner-all',
  // keyboard container
  container: 'ui-widget-content ui-widget ui-corner-all ui-helper-clearfix',
  // keyboard container extra class (same as container, but separate)
  popup: '',
  // default state
  buttonDefault: 'ui-state-default ui-corner-all',
  // hovered button
  buttonHover: 'ui-state-hover',
  // Action keys (e.g. Accept, Cancel, Tab, etc); this replaces 'actionClass' option
  buttonAction: 'ui-state-active',
  // Active keys (e.g. shift down, meta keyset active, combo keys active)
  buttonActive: 'ui-state-active',
  // used when disabling the decimal button {dec} when a decimal exists in the input area
  buttonDisabled: 'ui-state-disabled',
  buttonEmpty: 'ui-keyboard-empty'
},

// *** Useability ***
// Auto-accept content when clicking outside the keyboard (popup will close)
autoAccept: false,
// Auto-accept content even if the user presses escape (only works if `autoAccept` is `true`)
autoAcceptOnEsc: false,

// Prevents direct input in the preview window when true
lockInput: false,

// Prevent keys not in the displayed keyboard from being typed in
restrictInput: false,
// Additional allowed characters while restrictInput is true
restrictInclude: '', // e.g. 'a b foo \ud83d\ude38'

// Check input against validate function, if valid the accept button gets a class name of
// 'ui-keyboard-valid-input'. If invalid, the accept button gets a class name of
// 'ui-keyboard-invalid-input'
acceptValid: false,
// Auto-accept when input is valid; requires `acceptValid` set `true` & validate callback
autoAcceptOnValid: false,
// Check validation on keyboard initialization. If false, the "Accept" key state (color)
// will not change to show if the content is valid, or not
checkValidOnInit: true,

// if acceptValid is true & the validate function returns a false, this option will cancel
// a keyboard close only after the accept button is pressed
cancelClose: true,

// tab to go to next, shift-tab for previous (default behavior)
tabNavigation: false,

// enter for next input; shift+enter accepts content & goes to next
// shift + 'enterMod' + enter ('enterMod' is the alt as set below) will accept content and go
// to previous in a textarea
enterNavigation: false,
// mod key options: 'ctrlKey', 'shiftKey', 'altKey', 'metaKey' (MAC only)
enterMod: 'altKey', // alt-enter to go to previous; shift-alt-enter to accept & go to previous

// if true, the next button will stop on the last keyboard input/textarea; prev button stops at first
// if false, the next button will wrap to target the first input/textarea; prev will go to the last
stopAtEnd: true,

// Set this to append the keyboard after the input/textarea (appended to the input/textarea parent).
// This option works best when the input container doesn't have a set width & when the 'tabNavigation'
// option is true.
appendLocally: false,
// When appendLocally is false, the keyboard will be appended to this object
appendTo: 'body',

// Wrap all <br>s inside of a contenteditable in a div; without wrapping, the caret
// position will not be accurate
wrapBRs: true,

// If false, the shift key will remain active until the next key is (mouse) clicked on; if true it will
// stay active until pressed again
stickyShift: true,

// Prevent pasting content into the area
preventPaste: false,

// caret placed at the end of any text when keyboard becomes visible
caretToEnd: false,

// caret stays this many pixels from the edge of the input while scrolling left/right;
// use "c" or "center" to center the caret while scrolling
scrollAdjustment: 10,

// Set the max number of characters allowed in the input, setting it to false disables this option
maxLength: false,
// allow inserting characters @ caret when maxLength is set
maxInsert: true,

// Mouse repeat delay - when clicking/touching a virtual keyboard key, after this delay the key will
// start repeating
repeatDelay: 500,

// Mouse repeat rate - after the repeatDelay, this is the rate (characters per second) at which the
// key is repeated Added to simulate holding down a real keyboard key and having it repeat. I haven't
// calculated the upper limit of this rate, but it is limited to how fast the javascript can process
// the keys. And for me, in Firefox, it's around 20.
repeatRate: 20,

// resets the keyboard to the default keyset when visible
resetDefault: true,

// Event (namespaced) on the input to reveal the keyboard. To disable it, just set it to ''.
openOn: 'focus',

// enable the keyboard on readonly inputs
activeOnReadonly: false,

// Event (namepaced) for when the character is added to the input (clicking on the keyboard)
keyBinding: 'mousedown touchstart',

// enable/disable mousewheel functionality
// enabling still depends on the mousewheel plugin
useWheel: true,

// combos (emulate dead keys : http://en.wikipedia.org/wiki/Keyboard_layout#US-International)
// if user inputs `a the script converts it to à, ^o becomes ô, etc.
useCombos: true,

/*
  // *** Methods ***
  // commenting these out to reduce the size of the minified version
  // Callbacks - attach a function to any of these callbacks as desired
  initialized   : function(e, keyboard, el) {},
  beforeVisible : function(e, keyboard, el) {},
  visible       : function(e, keyboard, el) {},
  beforeInsert  : function(e, keyboard, el, textToAdd) { return textToAdd; },
  change        : function(e, keyboard, el) {},
  beforeClose   : function(e, keyboard, el, accepted) {},
  accepted      : function(e, keyboard, el) {},
  canceled      : function(e, keyboard, el) {},
  restricted    : function(e, keyboard, el) {},
  hidden        : function(e, keyboard, el) {},
  // called instead of base.switchInput
  switchInput   : function(keyboard, goToNext, isAccepted) {},
  // used if you want to create a custom layout or modify the built-in keyboard
  create        : function(keyboard) { return keyboard.buildKeyboard(); },

  // build key callback
  buildKey : function( keyboard, data ) {
    / *
    data = {
    // READ ONLY
    isAction : [boolean] true if key is an action key
    name     : [string]  key class name suffix ( prefix = 'ui-keyboard-' );
                         may include decimal ascii value of character
    value    : [string]  text inserted (non-action keys)
    title    : [string]  title attribute of key
    action   : [string]  keyaction name
    html     : [string]  HTML of the key; it includes a <span> wrapping the text
    // use to modify key HTML
    $key     : [object]  jQuery selector of key which is already appended to keyboard
    }
    * /
    return data;
  },
*/

// this callback is called, if the acceptValid is true, and just before the 'beforeClose' to check
// the value if the value is valid, return true and the keyboard will continue as it should
// (close if not always open, etc). If the value is not valid, return false and clear the keyboard
// value ( like this "keyboard.$preview.val('');" ), if desired. The validate function is called after
// each input, the 'isClosing' value will be false; when the accept button is clicked,
// 'isClosing' is true
validate: function (/* keyboard, value, isClosing */) {
  return true;
}

6. API methods

// reveal the keyboard
keyboard.reveal();

// redraw the keyboard
keyboard.redraw();

// accept keyboard content
keyboard.accept();

// close the keyboard
keyboard.close();

// insert text at the current caret position
keyboard.insertText("text");

// param1: start & end numeric value of the caret position
// param2: only used if a numeric caret end value is set to enable text selection
keyboard.caret(param1, param2);

// heck the current keyboard contents for letter combinations and convert them
keyboard.checkCombos();

// check the length of the current keyboard contents and remove any excess
keyboard.checkMaxLength();

// get the current key set
keyboard.getKeySet();

// show the key set
keyboard.showKeySet(meta);

// reposition the keyboard
keyboard.reposition();

// toggle the keyboard
keyboard.toggle();

// destroy the instance
keyboard.destroy();

// get the current value
keyboard.$preview.val();

// access any of the options
keyboard.options.{option};

// return true when the keyboard is the current
keyboard.isCurrent();

7. Properties.

// the text from the input/textarea before the keyboard opened
keyboard.originalContent

// information about the last key pressed
keyboard.last

// is the keyboard visible
keyboard.isVisible

// true when the shift key is active
keyboard.shiftActive

// true when the alt key is active
keyboard.altActive

// true when the meta key is active
keyboard.metaActive 

// true when the caps lock key is active
keyboard.capsLock 

// true when the keyboard (all keys and preview) is enabled
keyboard.enabled

8. Events.

$('#keyboard').on('initialized', function(e, keyboard, el){
  // el.id
  // el.value
});

$('#keyboard').on('beforeVisible', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('visible', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('change', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('keyboardChange', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('beforeClose', function(e, keyboard, el, accepted){
  // do something
});

$('#keyboard').on('accepted', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('canceled', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('hidden', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('inactive', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('restricted', function(e, keyboard, el){
  // do something
});

$('#keyboard').on('keysetChange', function(e, keyboard, el){
  // do something
});

Changelog:

v1.30.4 (2021-01-25)

  • Save & restore focus on init

v1.30.3 (2021-03-15)

  • Caret: Fix caret positioning in textarea

v1.30.2 (2020-05-12)

  • Drop input type conversion from number to text.
  • Throw error on non-supported input types. 
  • Fix input type detection.
  • Fix destroyed keyboard detection.
  • Update sign regex based on decimal setting. 
  • Updated multiple layouts: Oriya, Tamil, Telugu, Malayalam, Hindi, Kannada, Bengali, Gujarati, Marathi, Nepali, Punjabi & Urdu.
  • Fix French translation. 

This awesome jQuery plugin is developed by Mottie. For more Advanced Usages, please check the demo page or visit the official website.