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.
Checkboxes
Checkboxes allow the user to select one or more items from a set.
Design & API Documentation
Installation
npm install @material/checkbox
Basic Usage
We recommend using MDC Checkbox with MDC Form Field for enhancements such as label alignment, label activation of the ripple interaction effect, and RTL-awareness.
<div class="mdc-form-field">
<div class="mdc-checkbox">
<input type="checkbox"
class="mdc-checkbox__native-control"
id="checkbox-1"/>
<div class="mdc-checkbox__background">
<svg class="mdc-checkbox__checkmark"
viewBox="0 0 24 24">
<path class="mdc-checkbox__checkmark-path"
fill="none"
d="M1.73,12.91 8.1,19.28 22.79,4.59"/>
</svg>
<div class="mdc-checkbox__mixedmark"></div>
</div>
</div>
<label for="checkbox-1">Checkbox 1</label>
</div>
Note: If you are using IE, you need to include a closing </path>
tag if you wish to avoid console warnings.
Styles
@import "@material/form-field/mdc-form-field";
@import "@material/checkbox/mdc-checkbox";
JavaScript Instantiation
The checkbox will work without JavaScript, but you can enhance it with a ripple interaction effect by instantiating MDCCheckbox
on the mdc-checkbox
element. To activate the ripple effect upon interacting with the label, you must also instantiate MDCFormField
on the mdc-form-field
element and set the MDCCheckbox
instance as its input
.
import {MDCFormField} from '@material/form-field';
import {MDCCheckbox} from '@material/checkbox';
const checkbox = new MDCCheckbox(document.querySelector('.mdc-checkbox'));
const formField = new MDCFormField(document.querySelector('.mdc-form-field'));
formField.input = checkbox;
See Importing the JS component for more information on how to import JavaScript.
Variants
Disabled
Note that mdc-checkbox--disabled
is necessary on the root element of CSS-only checkboxes to prevent hover states from activating. Checkboxes that use the JavaScript component do not need this class; a disabled
attribute on the <input>
element is sufficient.
<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"
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>
Style Customization
MDC Checkbox uses MDC Theme's secondary
color by default for "marked" states (i.e., checked or indeterminate).
Sass Mixins
The following mixins apply only to enabled checkboxes. It is not currently possible to customize the color of a disabled checkbox.
Mixin | Description |
---|
mdc-checkbox-container-colors($unmarked-stroke-color, $unmarked-fill-color, $marked-stroke-color, $marked-fill-color, $generate-keyframes) | Generates CSS classes to set and animate the stroke color and/or container fill color of a checkbox |
mdc-checkbox-ink-color($color) | Sets the ink color of the checked and indeterminate icons |
mdc-checkbox-focus-indicator-color($color) | Sets the color of the focus indicator (ripple) when checkbox is selected or is in indeterminate state. |
mdc-checkbox-touch-dimension($touch-dimension) | Sets the touch dimension of the checkbox. |
The ripple effect for the Checkbox component is styled using MDC Ripple mixins.
mdc-checkbox-container-colors($unmarked-stroke-color, $unmarked-fill-color, $marked-stroke-color, $marked-fill-color, $generate-keyframes)
Stroke and fill color may be customized independently in both the marked and unmarked state.
All parameters are optional, and if left unspecified will use their default values.
If you plan to use CSS-only checkboxes, set $generate-keyframes
to false
to prevent the mixin from generating @keyframes
and CSS classes used by the JavaScript component.
Caveat: Edge and CSS Variables
In browsers that fully support CSS variables, MDC Checkbox references CSS variables wherever theme properties are used.
However, due to Edge's buggy CSS variable support, the background-color
for .mdc-checkbox__background::before
will not honor CSS variables in Edge.
This means you will need to override this style manually for Edge if you alter the CSS variable for the primary color.
MDCCheckbox
Properties and Methods
Property Name | Type | Description |
---|
checked | boolean | Setter/getter for the checkbox's checked state |
indeterminate | boolean | Setter/getter for the checkbox's indeterminate state |
disabled | boolean | Setter/getter for the checkbox's disabled state |
value | string | Setter/getter for the checkbox's |
Usage within Web Frameworks
If you are using a JavaScript framework, such as React or Angular, you can create a Checkbox for your framework. Depending on your needs, you can use the Simple Approach: Wrapping MDC Web Vanilla Components, or the Advanced Approach: Using Foundations and Adapters. Please follow the instructions here.
MDCCheckboxAdapter
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. |
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. |
isIndeterminate() => boolean | Returns true if the component is in the indeterminate state. |
isChecked() => boolean | Returns true if the component is checked. |
hasNativeControl() => boolean | Returns true if the input is present in the component. |
setNativeControlDisabled(disabled: boolean) => void | Sets the input to disabled. |
setNativeControlAttr(attr: string, value: string) => void | Sets an HTML attribute to the given value on the native input element. |
removeNativeControlAttr(attr: string) => void | Removes an attribute from the native input element. |
MDCCheckboxFoundation
Method Signature | Description |
---|
setDisabled(disabled: boolean) => void | Updates the disabled property on the underlying input. Does nothing when the underlying input is not present. |
handleAnimationEnd() => void | animationend event handler that should be applied to the root element. |
handleChange() => void | change event handler that should be applied to the checkbox element. |