simple-keyboard

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Javascript Virtual Keyboard - Customizable, responsive and lightweight

digital javascript js keyboard kiosk onscreen-keyboard osk screen-keyboard touch-screen touchscreen virtual-keyboard virtual-keyboards

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README.md

The easily customisable and responsive on-screen virtual keyboard for Javascript projects.

Installation

npm

npm install simple-keyboard --save

zip file (self-hosted)

Click here to download the latest release (zip format).

Want to use a CDN instead of self-host? Scroll down to the "Usage with CDN" instructions below.

Usage with npm

js

import Keyboard from 'simple-keyboard';
import 'simple-keyboard/build/css/index.css';

let keyboard = new Keyboard({
  onChange: input => onChange(input),
  onKeyPress: button => onKeyPress(button)
});

function onChange(input){
  document.querySelector(".input").value = input;
  console.log("Input changed", input);
}

function onKeyPress(button){
  console.log("Button pressed", button);
}

html

<input class="input" />
<div class="simple-keyboard"></div>

Need a more extensive example? Click here.

Usage with CDN

html

<html>
<head>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/simple-keyboard@latest/build/css/index.css">
</head>

<body>
  <input class="input" placeholder="Tap on the virtual keyboard to start" />
  <div class="simple-keyboard"></div>

  <script src="https://cdn.jsdelivr.net/npm/simple-keyboard@latest/build/index.min.js"></script>
  <script src="src/index.js"></script>
</body>

</html>

js (index.js)

let Keyboard = window.SimpleKeyboard.default;

let myKeyboard = new Keyboard({
  onChange: input => onChange(input),
  onKeyPress: button => onKeyPress(button)
});

function onChange(input) {
  document.querySelector(".input").value = input;
  console.log("Input changed", input);
}

function onKeyPress(button) {
  console.log("Button pressed", button);
}

Options

You can customize the Keyboard by passing options to it. Here are the available options (the code examples are the defaults):

layout

Modify the keyboard layout

layout: {
  'default': [
    '` 1 2 3 4 5 6 7 8 9 0 - = {bksp}',
    '{tab} q w e r t y u i o p [ ] \\',
    '{lock} a s d f g h j k l ; \' {enter}',
    '{shift} z x c v b n m , . / {shift}',
    '.com @ {space}'
  ],
  'shift': [
    '~ ! @ # $ % ^ & * ( ) _ + {bksp}',
    '{tab} Q W E R T Y U I O P { } |',
    '{lock} A S D F G H J K L : " {enter}',
    '{shift} Z X C V B N M < > ? {shift}',
    '.com @ {space}'
  ]
}

Looking for keyboard layouts in other languages? Check out simple-keyboard-layouts !

layoutName

Specifies which layout should be used.

layoutName: "default"

display

Replaces variable buttons (such as {bksp}) with a human-friendly name (e.g.: "backspace").

display: {
  '{bksp}': 'backspace',
  '{enter}': '< enter',
  '{shift}': 'shift',
  '{s}': 'shift',
  '{tab}': 'tab',
  '{lock}': 'caps',
  '{accept}': 'Submit',
  '{space}': ' ',
  '{//}': ' '
}

theme

A prop to add your own css classes to the keyboard wrapper. You can add multiple classes separated by a space.

theme: "hg-theme-default"

buttonTheme

A prop to add your own css classes to one or several buttons. You can add multiple classes separated by a space.

buttonTheme: [
  {
    class: "myCustomClass",
    buttons: "Q W E R T Y q w e r t y"
  },
  {
    class: "anotherCustomClass",
    buttons: "Q q"
  },
  ...
]

debug

Runs a console.log every time a key is pressed. Displays the buttons pressed and the current input.

debug: false

newLineOnEnter

Specifies whether clicking the "ENTER" button will input a newline (\n) or not.

newLineOnEnter: false

inputName

Allows you to use a single simple-keyboard instance for several inputs.

inputName: "default"

syncInstanceInputs

When set to true, this option synchronizes the internal input of every simple-keyboard instance.

syncInstanceInputs: false

physicalKeyboardHighlight

When set to true, this option adds the special class (hg-selectedButton) to the key that matches the event. For example, when you press the a key, that key in simple-keyboard will have the special class until the key is released.

For functional keys such as shift, note that the key's event.code is used. In that instance, pressing the left key will result in the code ShiftLeft. Therefore, the key must be named {shiftleft}. Click here for some of keys supported out of the box.

If in doubt, you can also set the debug option to true.

physicalKeyboardHighlight: true

onKeyPress

Executes the callback function on key press. Returns button layout name (i.e.: "{shift}").

onKeyPress: (button) => console.log(button)

onChange

Executes the callback function on input change. Returns the current input's string.

onChange: (input) => console.log(input)

onChangeAll

Executes the callback function on input change. Returns the input object with all defined inputs. This is useful if you're handling several inputs with simple-keyboard, as specified in the "Using several inputs" guide.

onChangeAll: (inputs) => console.log(inputs)

Methods

simple-keyboard has a few methods you can use to further control it's behavior. To access these functions, you need the instance the simple-keyboard component, like so:

var keyboard = new Keyboard({
  ...
});
/>

// Then, use as follows...
keyboard.methodName(params);

clearInput

Clear the keyboard's input.

// For default input (i.e. if you have only one)
keyboard.clearInput();

// For specific input
// Must have been previously set using the "inputName" prop.
keyboard.clearInput("inputName");

getInput

Get the keyboard's input (You can also get it from the onChange prop).

// For default input (i.e. if you have only one)
let input = keyboard.getInput();

// For specific input
// Must have been previously set using the "inputName" prop.
let input = keyboard.getInput("inputName");

setInput

Set the keyboard's input. Useful if you want to track input changes made outside simple-keyboard.

// For default input (i.e. if you have only one)
keyboard.setInput("Hello World!");

// For specific input
// Must have been previously set using the "inputName" prop.
keyboard.setInput("Hello World!", "inputName");

setOptions

Set new option or modify existing ones after initialization. The changes are applied immediately.

keyboard.setOptions({
  theme: "my-custom-theme"
});

dispatch

Send a command to all simple-keyboard instances at once (if you have multiple instances).

keyboard.dispatch(instance => {
  instance.setOptions({
    buttonTheme: [
      {
        class: "myClass",
        buttons: `a b c`
      }
    ]
  })
});

Q&A / Use-cases

How to give a different base class to my keyboard?

As you may have seen on the code samples, this is the default setup that simple-keyboard uses:

  <div class="simple-keyboard"></div>

let keyboard = new Keyboard({
  // Add options here
});

You can however change this by setting up simple-keyboard like so:

  <div class="myFavouriteClass"></div>

let keyboard = new Keyboard(".myFavouriteClass", {
  // Add options here
});

This can come in handy especially when dealing with multiple simple keyboard instances.

How to syncronize multiple instances of simple-keyboard

As shown above, you can run multiple instances of simple-keyboard. To keep their internal inputs in sync, set the syncInstanceInputs option to true.

If you want to send a command to all your simple-keyboard instances at once, you can use the dispatch method.

Here's a demo with both these features in action:

Here's an example of a full keyboard made out of multiple simple-keyboard instances:

Using several inputs

Set the inputName option for each input you want to handle with simple-keyboard.

For example:

  <input class="input" id="input1" value=""/>
  <input class="input" id="input2" value=""/>

  // Here we'll store the input id that simple-keyboard will be using.
  var selectedInput;

  // Initialize simple-keyboard as usual
  var keyboard = new Keyboard({
    onChange: input => onChange(input)
  });

  // Add an event listener for the inputs to be tracked
  document.querySelectorAll('.input')
    .forEach(input => input.addEventListener('focus', onInputFocus));

  /**
   * When an input is focused, it will be marked as selected (selectedInput)
   * This is so we can replace it's value on the onChange function
   *
   * Also, we will set the inputName option to a unique string identifying the input (id)
   * simple-keyboard save the input in this key and report changes through onChange
   */
  onInputFocus = event => {
    // Setting input as selected
    selectedInput = `#${event.target.id}`;

    // Set the inputName option on the fly !
    keyboard.setOptions({
      inputName: event.target.id
    });
  }

  // When the current input is changed, this is called
  onChange = input => {
    // If the input is not defined, grabbing the first ".input".
    let currentInput = selectedInput || '.input';

    // Updating the selected input's value
    document.querySelector(currentInput).value = input;
  }

See full example.

Having keys in a different language configuration

There's a number of key layouts available. To apply them, check out simple-keyboard-layouts.

If you'd like to contribute your own layouts, please submit your pull request at the simple-keyboard-layouts repository.

How to customize my keyboard layout?

If you'd like to create a layout in a language not currently supported by simple-keyboard-layouts, you definitely can.

Take following demo as an example:

If you have issues displaying a character, you might need its unicode code to display it. Here an useful converter tool:

r12a Unicode converter

Why is the caps lock button working like shift button?

For the sake of simplicity, caps lock and shift do the same action in the main demos. If you'd like to show a different layout when you press caps lock, check out the following demo:

How to display a full keyboard

You can display a full keyboard by linking together multiple Simple Keyboard instances. This is because you might want different sections of your keyboard to have different spacing and styling.

Please refer to the documentation on the syncInstanceInputs option, which allows you to sync the input of all your simple-keyboard instances.

Also, check out this demo:

Demo

https://franciscohodge.com/simple-keyboard/demo

To run demo on your own computer

Clone this repository
npm install
npm start
Visit http://localhost:3000/

Other versions

ReactJS - react-simple-keyboard

Contributing

PR's and issues are welcome. Feel free to submit any issues you have at: https://github.com/hodgef/simple-keyboard/issues