@material/checkbox

What is @material/checkbox?

@material/checkbox is a Material Design implementation of a checkbox component. It provides a customizable and accessible checkbox that can be used in web applications to allow users to make binary choices.

What are @material/checkbox's main functionalities?

Basic Checkbox

This code demonstrates how to initialize a basic Material Design checkbox using the @material/checkbox package.

import {MDCCheckbox} from '@material/checkbox';

const checkbox = new MDCCheckbox(document.querySelector('.mdc-checkbox'));

Indeterminate State

This code shows how to set a checkbox to an indeterminate state, which is useful for indicating a mixed selection.

import {MDCCheckbox} from '@material/checkbox';

const checkbox = new MDCCheckbox(document.querySelector('.mdc-checkbox'));
checkbox.indeterminate = true;

Handling Change Events

This code demonstrates how to listen for change events on the checkbox and handle them accordingly.

import {MDCCheckbox} from '@material/checkbox';

const checkbox = new MDCCheckbox(document.querySelector('.mdc-checkbox'));
checkbox.listen('change', () => {
  console.log('Checkbox state changed to: ', checkbox.checked);
});

Other packages similar to @material/checkbox

react-checkbox-group

react-checkbox-group is a React component for managing a group of checkboxes. It provides a simple API for handling multiple checkboxes and their states. Unlike @material/checkbox, which is a standalone Material Design component, react-checkbox-group is specifically designed for React applications and focuses on managing groups of checkboxes.

rc-checkbox

rc-checkbox is a React component for creating customizable checkboxes. It offers more flexibility in terms of styling and behavior compared to @material/checkbox. While @material/checkbox follows Material Design guidelines, rc-checkbox allows for more customization options.

react-toggle

react-toggle is a React component for creating toggle switches, which can be used as an alternative to checkboxes. It provides a different UI/UX compared to @material/checkbox but serves a similar purpose of allowing users to make binary choices. It is more suitable for applications that prefer toggle switches over traditional checkboxes.

README

MDC Checkbox

The MDC Checkbox component is a spec-aligned checkbox component adhering to the Material Design checkbox requirements. It works without JavaScript with basic functionality for all states. If you use the JavaScript object for a checkbox, it will add more intricate animation effects when switching between states.

Installation

npm install --save @material/checkbox

Usage

Standalone Checkbox

<div class="mdc-checkbox">
  <input type="checkbox"
         class="mdc-checkbox__native-control"/>
  <div class="mdc-checkbox__background">
    <svg version="1.1"
         class="mdc-checkbox__checkmark"
         xmlns="http://www.w3.org/2000/svg"
         viewBox="0 0 24 24"
         xml:space="preserve">
      <path class="mdc-checkbox__checkmark__path"
            fill="none"
            stroke="white"
            d="M1.73,12.91 8.1,19.28 22.79,4.59"/>
    </svg>
    <div class="mdc-checkbox__mixedmark"></div>
  </div>
</div>

The checkbox component is driven by an underlying native checkbox element. This element is sized and positioned the same way as the checkbox component itself, allowing for proper behavior of assistive devices.

You can also add an mdc-checkbox--theme-dark modifier class to the component to use the dark theme checkbox styles.

Additionally, the checkbox can be used in conjunction with mdc-form-field to easily position checkboxes and their labels.

<div class="mdc-form-field">
  <div class="mdc-checkbox">
    <input type="checkbox"
           id="my-checkbox"
           class="mdc-checkbox__native-control"/>
    <div class="mdc-checkbox__background">
      <svg version="1.1"
           class="mdc-checkbox__checkmark"
           xmlns="http://www.w3.org/2000/svg"
           viewBox="0 0 24 24"
           xml:space="preserve">
        <path class="mdc-checkbox__checkmark__path"
              fill="none"
              stroke="white"
              d="M1.73,12.91 8.1,19.28 22.79,4.59"/>
      </svg>
      <div class="mdc-checkbox__mixedmark"></div>
    </div>
  </div>

  <label for="my-checkbox">My Checkbox Label</label>
</div>

Using the JS Component

MDC Checkbox ships with a Component / Foundation combo which progressively enhances the checkbox state transitions to achieve full parity with the material design motion for switching checkbox states.

Including in code

ES2015

import {MDCCheckbox, MDCCheckboxFoundation} from 'mdc-checkbox';

CommonJS

const mdcCheckbox = require('mdc-checkbox');
const MDCCheckbox = mdcCheckbox.MDCCheckbox;
const MDCCheckboxFoundation = mdcCheckbox.MDCCheckboxFoundation;

AMD

require(['path/to/mdc-checkbox'], mdcCheckbox => {
  const MDCCheckbox = mdcCheckbox.MDCCheckbox;
  const MDCCheckboxFoundation = mdcCheckbox.MDCCheckboxFoundation;
});

Global

const MDCCheckbox = mdc.checkbox.MDCCheckbox;
const MDCCheckboxFoundation = mdc.checkbox.MDCCheckboxFoundation;

Automatic Instantiation

If you do not care about retaining the component instance for the checkbox, simply call attachTo() and pass it a DOM element.

mdc.checkbox.MDCCheckbox.attachTo(document.querySelector('.mdc-checkbox'));

Manual Instantiation

Checkboxes can easily be initialized using their default constructors as well, similar to attachTo.

import {MDCCheckbox} from 'mdc-checkbox';

const checkbox = new MDCCheckbox(document.querySelector('.mdc-checkbox'));

MDCCheckbox API

The MDCCheckbox API provides accessor properties similar to those found on a native checkbox element.

MDCCheckbox.checked

Boolean. Returns whether or not the checkbox is checked. Setting this property will update the underlying checkbox element.

MDCCheckbox.indeterminate

Boolean. Returns whether or not the checkbox is indeterminate. Setting this property will update the underlying checkbox element.

MDCCheckbox.disabled

Boolean. Returns whether or not the checkbox is disabled. Setting this property will update the underlying checkbox element.

Using the Foundation Class

MDC Checkbox ships with an MDCCheckboxFoundation class that external frameworks and libraries can use to integrate the component. As with all foundation classes, an adapter object must be provided. The adapter for checkboxes must provide the following functions, with correct signatures:

Method Signature	Description
addClass(className: string) => void	Adds a class to the root element.
removeClass(className: string) => void	Removes a class from the root element.
registerAnimationEndHandler(handler: EventListener) => void	Registers an event handler to be called when an animationend event is triggered on the root element. Note that you must account for
vendor prefixes in order for this to work correctly.
deregisterAnimationEndHandler(handler: EventListener) => void	Deregisters an event handler from an animationend event listener. This will only be called with handlers that have previously been passed to registerAnimationEndHandler calls.
registerChangeHandler(handler: EventListener) => void	Registers an event handler to be called when a change event is triggered on the native control (not the root element).
deregisterChangeHandler(handler: EventListener) => void	Deregisters an event handler that was previously passed to registerChangeHandler.
getNativeControl() => HTMLInputElement?	Returns the native checkbox control, if available. Note that if this control is not available, the methods that rely on it will exit gracefully.
forceLayout() => void	Force-trigger a layout on the root element. This is needed to restart
animations correctly. If you find that you do not need to do this, you can simply make it a no-op.
isAttachedToDOM() => boolean	Returns true if the component is currently attached to the DOM, false otherwise.`

MDCCheckboxFoundation API

MDCCheckboxFoundation.isChecked() => boolean

Returns whether or not the underlying input is checked. Returns false when no input is available.

MDCCheckboxFoundation.setChecked(checked: boolean)

Updates the checked property on the underlying input. Does nothing when the underlying input is not present.

MDCCheckboxFoundation.isIndeterminate() => boolean

Returns whether or not the underlying input is indeterminate. Returns false when no input is available.

MDCCheckboxFoundation.setIndeterminate(indeterminate: boolean)

Updates the indeterminate property on the underlying input. Does nothing when the underlying input is not present.

MDCCheckboxFoundation.isDisabled() => boolean

Returns whether or not the underlying input is disabled. Returns false when no input is available.

MDCCheckboxFoundation.setDisabled(disabled: boolean)

Updates the disabled property on the underlying input. Does nothing when the underlying input is not present.

Theming

TK once mdc-theming lands.