Checkboxes

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.

Design & API Documentation

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 class="mdc-checkbox__checkmark"
         viewBox="0 0 24 24">
      <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 class="mdc-checkbox__checkmark"
           viewBox="0 0 24 24">
        <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>

Disabled Checkboxes

<div class="mdc-checkbox mdc-checkbox--disabled">
  <input type="checkbox"
         id="basic-disabled-checkbox"
         class="mdc-checkbox__native-control"
         disabled />
  <div class="mdc-checkbox__background">
    <svg class="mdc-checkbox__checkmark"
         viewBox="0 0 24 24">
      <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="basic-disabled-checkbox" id="basic-disabled-checkbox-label">This is my disabled checkbox</label>

Note that mdc-checkbox--disabled is necessary on the root element to prevent hover states from activating.

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 '@material/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 '@material/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.

MDCCheckbox.value

String. Returns the checkbox’s value. 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.

MDCCheckboxFoundation.getValue() => string

Returns the value of adapter.getNativeControl().value. Returns null if getNativeControl() does not return an object.

MDCCheckboxFoundation.setValue(value: string) => void

Sets the value of adapter.getNativeControl().value. Does nothing if getNativeControl() does not return an object.

Theming

TK once mdc-theming lands.