Material Design

Radio Buttons

Radio buttons screenshot

Radio buttons allow the user to select one option from a set while seeing all available options.

Design & API Documentation

Installation

npm install @material/radio

Basic Usage

We recommend using MDC Radio with MDC Form Field for enhancements such as label alignment, label activation of the ripple interaction effect, and RTL-awareness.

HTML Structure

<div class="mdc-form-field">
  <div class="mdc-radio">
    <input class="mdc-radio__native-control" type="radio" id="radio-1" name="radios" checked>
    <div class="mdc-radio__background">
      <div class="mdc-radio__outer-circle"></div>
      <div class="mdc-radio__inner-circle"></div>
    </div>
  </div>
  <label for="radio-1">Radio 1</label>
</div>

Styles

@import "@material/form-field/mdc-form-field";
@import "@material/radio/mdc-radio";

JavaScript Instantiation

The radio button will work without JavaScript, but you can enhance it with a ripple interaction effect by instantiating MDCRadio on the mdc-radio 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 MDCRadio instance as its input.

import {MDCFormField} from '@material/form-field';
import {MDCRadio} from '@material/radio';

const radio = new MDCRadio(document.querySelector('.mdc-radio'));
const formField = new MDCFormField(document.querySelector('.mdc-form-field'));
formField.input = radio;

See Importing the JS component for more information on how to import JavaScript.

Variants

Disabled

To disable a radio button, add the mdc-radio--disabled class to the root element and set the disabled attribute on the <input> element. Disabled radio buttons cannot be interacted with and have no visual interaction effect.

<div class="mdc-form-field">
  <div class="mdc-radio mdc-radio--disabled">
    <input class="mdc-radio__native-control" type="radio" id="radio-1" name="radios" disabled>
    <div class="mdc-radio__background">
      <div class="mdc-radio__outer-circle"></div>
      <div class="mdc-radio__inner-circle"></div>
    </div>
  </div>
  <label for="radio-1">Radio 1</label>
</div>

Style Customization

MDC Radio uses MDC Theme’s secondary color by default. Use the following mixins to customize it.

Sass Mixins

Mixin Description
mdc-radio-unchecked-stroke-color($color) Sets the stroke color of an unchecked radio button
mdc-radio-checked-stroke-color($color) Sets the stroke color of a checked radio button
mdc-radio-ink-color($color) Sets the ink color of a radio button
mdc-radio-focus-indicator-color($color) Sets the color of the focus indicator

Caveat: Edge and CSS Custom Properties

In browsers that fully support CSS custom properties, the above mixins will work if you pass in a MDC Theme property (e.g. primary) as an argument. However, Edge does not fully support CSS custom properties. If you are using any of the Sass mixins, you must pass in an actual color value for support in Edge.

MDCRadio Properties and Methods

Property Value Type Description
checked Boolean Proxies to the foundation’s isChecked/setChecked methods
disabled Boolean Proxies to the foundation’s isDisabled/setDisabled methods
value String Proxies to the foundation’s getValue/setValue methods

Usage within Web Frameworks

If you are using a JavaScript framework, such as React or Angular, you can create a Radio button 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.

MDCRadioAdapter

Method Signature Description
getNativeControl() => HTMLInputElement? Returns the native radio control, if available
addClass(className: string) => void Adds a class to the root element
removeClass(className: string) => void Removes a class from the root element

MDCRadioFoundation

Method Signature Description
isChecked() => boolean Returns whether the native control is checked, or false if there’s no native control
setChecked(checked: boolean) => void Sets the checked value of the native control
isDisabled() => boolean Returns whether the native control is disabled, or false if there’s no native control
setDisabled(disabled: boolean) => void Sets the disabled value of the native control
getValue() => string Returns the value of the native control, or null if there’s no native control
setValue(value: string) => void Sets the value of the native control