Radio

A Radio is a binary input that is usually combined in a group of two or more options. They signal a pattern where users can only select one of the available options. Radios are also known as “radio buttons”.

Guidelines

When to use radios

Radios must feature a descriptive label. They must be part of a radio group of at least two elements. A radio may also have sub-components or child radio groups.

Use the Radio component to make a single selection from a list of options where only one choice is allowed. When multiple selections are needed, use Checkbox instead.

Specifications

1. Radio
   Radio buttons make the selection visually distinct.
2. Label
   The Radio must always contain a label, with the text size matching the base font size for consistency with the body text. Labels can include links and bold text and should be concise, clearly indicating the selected option.
3. Description (optional)
   If additional information about the label is required, a description can be included.
4. Custom input (optional)
   An additional input field can be included within the Radio to allow the user to input a custom response.

Component limitations

A group of radios should consist of at least 2 radios, with no maximum limit on the number of radios per group.

The Radio label will expand to fit longer text while the radio itself remains aligned with the first line of the label's text.

Refer to the Radio component in Codex Figma.

Types

Depending on the content type, the following types of Radios are available:

1. With only label
   By default, the Radio always includes a label that matches the base font size for consistency.
2. With description
   In some cases, an optional description can be added below the label for additional information.
3. With custom input
   In cases where additional user input is required, an optional custom input field can be added below the label or description.

The custom input within the Radio can include any of the following form components designed to gather user input, including:

1. TextInput and TextArea
2. Select
3. Combobox
4. ChipInput
5. Lookup
6. A combination of more than one input

Note: Groups of Checkboxes, Radios, and Toggle switches are not allowed within this custom input.

Interaction states

Radio buttons’ states were designed using accessible color variations. In addition to the 'disc' icon, these make it easier to differentiate between the radio button’s selected and unselected modes (e.g. disabled, hover, active):

1. Default unselected
2. Hover unselected
3. Active unselected
4. Focus unselected
5. Disabled unselected
6. Default selected
7. Hover selected
8. Active selected
9. Focus selected
10. Disabled selected

Accessibility note

The disabled state does not meet our minimum color contrast rules. WCAG 2.1 states that “…part[s] of an inactive user interface component […] have no contrast requirement”.^[1]
Provide sufficient information in a disabled element's context, so the user can understand what is disabled and how to enable it (if applicable).

Best practices

Consider the following recommendations when using radios.

Label’s format

Do:

• Accompany the Radio with a label that matches the base font size.
• Include a description below the label to provide additional information.
• Use text formatting like bold and italic in the label.
• Include standalone links within the label to provide additional information regarding a specific option when necessary.

Don't:

• Bold all Radio label.
• Link the entire Radio label as it could cause issues with the selection.

Inline radios

Do:

• Use inline radios, but reserve its use for specific cases to prevent disruptions in the reading flow.

Don't:

• Use inline radios if there are too many radios per line.
• Use inline radios if there is significant variation in the length of the radios labels.

Custom input within the Radio

Do:

• Combine 2 different fields within the custom input if needed.

Don't:

• Nest another group of radios, checkboxes, or toggle switches within the custom input.

Do:

• Display the custom input at the end of a Radio group whenever possible.
• Disable the custom input unless its corresponding Radio is selected.

Don't:

• Design a layout where multiple Radios include custom inputs visible simultaneously.
• Enable the custom input when its corresponding Radio is not selected.

Content

A radio button ensure that a reader chooses only one option from a set of two or more. Keeping choices simple and mutually exclusive makes for concise, effective and trustworthy content.

Do:

• Keep the choices short and mutually exclusive. Concise, Clear & Trustworthy

Don't:

• Make the options overly long or complicated. Concise, Clear & Trustworthy

Keyboard navigation

Key	Function
Tab	The focus is placed on the next interactive element in tab order.
Shift + Tab	The focus is placed on the previous interactive element.
Up arrow / Down arrow / Left arrow / Right arrow	When the focus is placed on a Radio within a group, the arrow keys move the focus between the different Radios and select them.

References

1. Web Content Accessibility Guidelines (WCAG) 2.1 – Success Criterion 1.4.3 Contrast (Minimum)

Demos

Open up the browser console to see events emitted on input.

Label and description

Always include label text via the default slot. You can also add description text via the #description slot.

This demo uses the Field component—usage of this component is described in the next section.

Search completion

Default (recommended) Corrects up to two typos. Removes redirects that are very similar to the main title.

Strict mode (advanced) No typo correction. No accent folding. Strict matching.

NPM

<template>
	<cdx-field :is-fieldset="true">
		<template #label>
			Search completion
		</template>
		<cdx-radio
			v-for="radio in radios"
			:key="'radio-' + radio.value"
			v-model="radioValue"
			name="radio-group-descriptions"
			:input-value="radio.value"
		>
			{{ radio.label }}
			<template #description>
				{{ radio.description }}
			</template>
		</cdx-radio>
	</cdx-field>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxRadio, CdxField } from '@wikimedia/codex';

export default defineComponent( {
	name: 'RadiosWithDescriptions',
	components: { CdxRadio, CdxField },
	setup() {
		const radioValue = ref( 'default' );
		const radios = [
			{
				label: 'Default (recommended)',
				description: 'Corrects up to two typos. Removes redirects that are very similar to the main title.',
				value: 'default'
			},
			{
				label: 'Strict mode (advanced)',
				description: 'No typo correction. No accent folding. Strict matching.',
				value: 'strict'
			}
		];

		return {
			radioValue,
			radios
		};
	}
} );
</script>

MediaWiki

<template>
	<cdx-field :is-fieldset="true">
		<template #label>
			Search completion
		</template>
		<cdx-radio
			v-for="radio in radios"
			:key="'radio-' + radio.value"
			v-model="radioValue"
			name="radio-group-descriptions"
			:input-value="radio.value"
		>
			{{ radio.label }}
			<template #description>
				{{ radio.description }}
			</template>
		</cdx-radio>
	</cdx-field>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxRadio, CdxField } = require( '@wikimedia/codex' );

module.exports = defineComponent( {
	name: 'RadiosWithDescriptions',
	components: { CdxRadio, CdxField },
	setup() {
		const radioValue = ref( 'default' );
		const radios = [
			{
				label: 'Default (recommended)',
				description: 'Corrects up to two typos. Removes redirects that are very similar to the main title.',
				value: 'default'
			},
			{
				label: 'Strict mode (advanced)',
				description: 'No typo correction. No accent folding. Strict matching.',
				value: 'strict'
			}
		];

		return {
			radioValue,
			radios
		};
	}
} );
</script>

Name	Value
View
Reading direction	Left to right (LTR) Right to left (RTL)

Form field

When used in a form, a group of Radios can be wrapped in the Field component to add features like a semantic label, description and help text, validation messages, and more. See the Field page for more information.

When building a Radio field, always set isFieldset to true to ensure proper accessibility support. This wraps the group in a <fieldset> element and labels it with an associated <legend>.

If using a Radio group outside of a form, follow the instructions in the next demo.

Notifications Choose how often you'd like to receive notifications

Daily

Weekly

Monthly

Note that you can update this preference later

NPM

<template>
	<cdx-field :is-fieldset="true">
		<cdx-radio
			v-for="radio in radios"
			:key="'radio-' + radio.value"
			v-model="radioValue"
			name="radio-group-field"
			:input-value="radio.value"
		>
			{{ radio.label }}
		</cdx-radio>
		<template #label>
			Notifications
		</template>
		<template #description>
			Choose how often you'd like to receive notifications
		</template>
		<template #help-text>
			Note that you can update this preference later
		</template>
	</cdx-field>
</template>

<script>
import { defineComponent, ref } from 'vue';
import {
	CdxField,
	CdxRadio
} from '@wikimedia/codex';

export default defineComponent( {
	name: 'RadioGroupField',
	components: {
		CdxField,
		CdxRadio
	},
	setup() {
		const radioValue = ref( 'daily' );
		const radios = [
			{
				label: 'Daily',
				value: 'daily'
			},
			{
				label: 'Weekly',
				value: 'weekly'
			},
			{
				label: 'Monthly',
				value: 'monthly'
			}
		];

		return {
			radioValue,
			radios
		};
	}
} );
</script>

MediaWiki

<template>
	<cdx-field :is-fieldset="true">
		<cdx-radio
			v-for="radio in radios"
			:key="'radio-' + radio.value"
			v-model="radioValue"
			name="radio-group-field"
			:input-value="radio.value"
		>
			{{ radio.label }}
		</cdx-radio>
		<template #label>
			Notifications
		</template>
		<template #description>
			Choose how often you'd like to receive notifications
		</template>
		<template #help-text>
			Note that you can update this preference later
		</template>
	</cdx-field>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const {
	CdxField,
	CdxRadio
} = require( '@wikimedia/codex' );

module.exports = defineComponent( {
	name: 'RadioGroupField',
	components: {
		CdxField,
		CdxRadio
	},
	setup() {
		const radioValue = ref( 'daily' );
		const radios = [
			{
				label: 'Daily',
				value: 'daily'
			},
			{
				label: 'Weekly',
				value: 'weekly'
			},
			{
				label: 'Monthly',
				value: 'monthly'
			}
		];

		return {
			radioValue,
			radios
		};
	}
} );
</script>

Radio group

For a group of radios, each Radio component's v-model will be bound to the same ref, which is equal to the inputValue prop of the selected Radio. Use the same name prop for all of the Radio components in a group.

This demo shows what to do when using a Radio group outside of a form:

1. Wrap the group in an element with role="radiogroup"
2. Connect the group with a label via the aria-labelledby attribute

Radio group value: radio-2

Radio group demo

Radio 1

Radio 2 (initially selected)

Radio 3, which has a very long label that spans onto a second line to demonstrate what happens when text wraps

Radio 4 (disabled)

NPM

<template>
	<div>
		<p class="cdx-docs-demo-text">
			Radio group value: {{ radioValue }}
		</p>

		<div role="radiogroup" aria-labelledby="cdx-demo-radio-group-label">
			<cdx-label id="cdx-demo-radio-group-label">
				Radio group demo
			</cdx-label>

			<cdx-radio
				v-for="radio in radios"
				:key="'radio-' + radio.value"
				v-model="radioValue"
				name="radio-group"
				:input-value="radio.value"
				:disabled="radio.disabled"
				@update:model-value="onUpdate"
			>
				{{ radio.label }}
			</cdx-radio>
		</div>
	</div>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxRadio, CdxLabel } from '@wikimedia/codex';

export default defineComponent( {
	name: 'RadioGroup',
	components: { CdxRadio, CdxLabel },
	setup() {
		const radioValue = ref( 'radio-2' );
		const radios = [
			{
				label: 'Radio 1',
				value: 'radio-1',
				disabled: false
			},
			{
				label: 'Radio 2 (initially selected)',
				value: 'radio-2',
				disabled: false
			},
			{
				label: 'Radio 3, which has a very long label that spans onto a second line to demonstrate what happens when text wraps',
				value: 'radio-3',
				disabled: false
			},
			{
				label: 'Radio 4 (disabled)',
				value: 'radio-4',
				disabled: true
			}
		];

		const onUpdate = function ( value ) {
			// eslint-disable-next-line no-console
			console.log( 'update:modelValue event emitted with value: ' + value );
		};

		return {
			radioValue,
			radios,
			onUpdate
		};
	}
} );
</script>

MediaWiki

<template>
	<div>
		<p class="cdx-docs-demo-text">
			Radio group value: {{ radioValue }}
		</p>

		<div role="radiogroup" aria-labelledby="cdx-demo-radio-group-label">
			<cdx-label id="cdx-demo-radio-group-label">
				Radio group demo
			</cdx-label>

			<cdx-radio
				v-for="radio in radios"
				:key="'radio-' + radio.value"
				v-model="radioValue"
				name="radio-group"
				:input-value="radio.value"
				:disabled="radio.disabled"
				@update:model-value="onUpdate"
			>
				{{ radio.label }}
			</cdx-radio>
		</div>
	</div>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxRadio, CdxLabel } = require( '@wikimedia/codex' );

module.exports = defineComponent( {
	name: 'RadioGroup',
	components: { CdxRadio, CdxLabel },
	setup() {
		const radioValue = ref( 'radio-2' );
		const radios = [
			{
				label: 'Radio 1',
				value: 'radio-1',
				disabled: false
			},
			{
				label: 'Radio 2 (initially selected)',
				value: 'radio-2',
				disabled: false
			},
			{
				label: 'Radio 3, which has a very long label that spans onto a second line to demonstrate what happens when text wraps',
				value: 'radio-3',
				disabled: false
			},
			{
				label: 'Radio 4 (disabled)',
				value: 'radio-4',
				disabled: true
			}
		];

		const onUpdate = function ( value ) {
			// eslint-disable-next-line no-console
			console.log( 'update:modelValue event emitted with value: ' + value );
		};

		return {
			radioValue,
			radios,
			onUpdate
		};
	}
} );
</script>

Inline radios

Use the inline prop to get an inline layout.

Inline Radio group demo

Radio 1

Radio 2

NPM

<template>
	<cdx-field :is-fieldset="true" :hide-label="true">
		<template #label>
			Inline Radio group demo
		</template>
		<cdx-radio
			v-for="radio in radios"
			:key="'radio-' + radio.value"
			v-model="radioValue"
			name="inline-radios"
			:input-value="radio.value"
			:inline="true"
			@update:model-value="onUpdate"
		>
			{{ radio.label }}
		</cdx-radio>
	</cdx-field>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxRadio, CdxField } from '@wikimedia/codex';

export default defineComponent( {
	name: 'InlineRadios',
	components: { CdxRadio, CdxField },
	setup() {
		const radioValue = ref( 'radio-1' );
		const radios = [
			{
				label: 'Radio 1',
				value: 'radio-1'
			},
			{
				label: 'Radio 2',
				value: 'radio-2'
			}
		];

		const onUpdate = function ( value ) {
			// eslint-disable-next-line no-console
			console.log( 'update:modelValue event emitted with value: ' + value );
		};

		return {
			radioValue,
			radios,
			onUpdate
		};
	}
} );
</script>

MediaWiki

<template>
	<cdx-field :is-fieldset="true" :hide-label="true">
		<template #label>
			Inline Radio group demo
		</template>
		<cdx-radio
			v-for="radio in radios"
			:key="'radio-' + radio.value"
			v-model="radioValue"
			name="inline-radios"
			:input-value="radio.value"
			:inline="true"
			@update:model-value="onUpdate"
		>
			{{ radio.label }}
		</cdx-radio>
	</cdx-field>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxRadio, CdxField } = require( '@wikimedia/codex' );

module.exports = defineComponent( {
	name: 'InlineRadios',
	components: { CdxRadio, CdxField },
	setup() {
		const radioValue = ref( 'radio-1' );
		const radios = [
			{
				label: 'Radio 1',
				value: 'radio-1'
			},
			{
				label: 'Radio 2',
				value: 'radio-2'
			}
		];

		const onUpdate = function ( value ) {
			// eslint-disable-next-line no-console
			console.log( 'update:modelValue event emitted with value: ' + value );
		};

		return {
			radioValue,
			radios,
			onUpdate
		};
	}
} );
</script>

With no initial selection

Radio group value:

Radio group demo with no initial selection

Radio 1

Radio 2

Radio 3

NPM

<template>
	<div>
		<p class="cdx-docs-demo-text">
			Radio group value: {{ radioValue }}
		</p>

		<div role="radiogroup" aria-labelledby="cdx-demo-radio-group-no-selection-label">
			<cdx-label id="cdx-demo-radio-group-no-selection-label">
				Radio group demo with no initial selection
			</cdx-label>

			<cdx-radio
				v-for="radio in radios"
				:key="'radio-' + radio.value"
				v-model="radioValue"
				name="radio-group-no-selection"
				:input-value="radio.value"
				:disabled="radio.disabled"
				@update:model-value="onUpdate"
			>
				{{ radio.label }}
			</cdx-radio>
		</div>
	</div>
</template>

<script>
import { defineComponent, ref } from 'vue';
import { CdxRadio, CdxLabel } from '@wikimedia/codex';

export default defineComponent( {
	name: 'RadioGroupNoSelection',
	components: { CdxRadio, CdxLabel },
	setup() {
		const radioValue = ref( '' );
		const radios = [
			{
				label: 'Radio 1',
				value: 'radio-1'
			},
			{
				label: 'Radio 2',
				value: 'radio-2'
			},
			{
				label: 'Radio 3',
				value: 'radio-3'
			}
		];

		const onUpdate = function ( value ) {
			// eslint-disable-next-line no-console
			console.log( 'update:modelValue event emitted with value: ' + value );
		};

		return {
			radioValue,
			radios,
			onUpdate
		};
	}
} );
</script>

MediaWiki

<template>
	<div>
		<p class="cdx-docs-demo-text">
			Radio group value: {{ radioValue }}
		</p>

		<div role="radiogroup" aria-labelledby="cdx-demo-radio-group-no-selection-label">
			<cdx-label id="cdx-demo-radio-group-no-selection-label">
				Radio group demo with no initial selection
			</cdx-label>

			<cdx-radio
				v-for="radio in radios"
				:key="'radio-' + radio.value"
				v-model="radioValue"
				name="radio-group-no-selection"
				:input-value="radio.value"
				:disabled="radio.disabled"
				@update:model-value="onUpdate"
			>
				{{ radio.label }}
			</cdx-radio>
		</div>
	</div>
</template>

<script>
const { defineComponent, ref } = require( 'vue' );
const { CdxRadio, CdxLabel } = require( '@wikimedia/codex' );

module.exports = defineComponent( {
	name: 'RadioGroupNoSelection',
	components: { CdxRadio, CdxLabel },
	setup() {
		const radioValue = ref( '' );
		const radios = [
			{
				label: 'Radio 1',
				value: 'radio-1'
			},
			{
				label: 'Radio 2',
				value: 'radio-2'
			},
			{
				label: 'Radio 3',
				value: 'radio-3'
			}
		];

		const onUpdate = function ( value ) {
			// eslint-disable-next-line no-console
			console.log( 'update:modelValue event emitted with value: ' + value );
		};

		return {
			radioValue,
			radios,
			onUpdate
		};
	}
} );
</script>

With custom input

To add a custom input, use the custom-input slot to pass in an input like TextInput, TextArea, Select, Combobox, ChipInput, Lookup, or a combination of more than one input.

In the example below, the custom input is always visible but remains disabled until its parent Radio component is selected. Inside the custom input <div>, a Field wraps the TextInput to display its own validation message.

Expiration When do you want the block to expire?

Preset duration

Specific date and time

Other duration

NPM

<template>
	<!-- Note: This form does not POST or GET on submit -->
	<form
		id="block-expiration"
		name="expiration-form"
	>
		<cdx-field
			:is-fieldset="true"
			:status="status"
			:messages="messages"
			form="block-expiration"
		>
			<template #label>
				Expiration
			</template>
			<template #description>
				When do you want the block to expire?
			</template>
			<cdx-radio
				v-for="radio in radios"
				:key="'radio-' + radio.value"
				v-model="radioValue"
				name="radio-with-custom-input-demo"
				:input-value="radio.value"
				@change="validate( $event )"
			>
				{{ radio.label }}
				<template v-if="radio.value === 'other'" #custom-input>
					<cdx-field
						:is-fieldset="true"
						:status="textFieldStatus"
						:messages="textFieldMessages"
						class="my-custom-input-field"
					>
						<cdx-text-input
							v-model="otherInputValue"
							aria-label="TextInput custom input"
							placeholder="Custom duration..."
							:disabled="radioValue !== 'other'"
						/>
					</cdx-field>
				</template>
			</cdx-radio>
		</cdx-field>
		<cdx-button
			class="my-button"
			action="progressive"
			weight="primary"
			form="block-expiration"
			name="submit-expiration"
			type="submit"
			@click.prevent="onSubmit"
		>
			Submit
		</cdx-button>
	</form>
</template>

<script>
import { defineComponent, ref, watch } from 'vue';
import { CdxRadio, CdxField, CdxTextInput, CdxButton } from '@wikimedia/codex';

export default defineComponent( {
	name: 'RadiosWithCustomInput',
	components: { CdxRadio, CdxField, CdxTextInput, CdxButton },
	setup() {
		const radioValue = ref( '' );
		const radios = [
			{
				label: 'Preset duration',
				value: 'preset'
			},
			{
				label: 'Specific date and time',
				value: 'specific'
			},
			{
				label: 'Other duration',
				value: 'other'
			}
		];
		const otherInputValue = ref( '' );

		// Validation
		const status = ref( 'default' );
		const textFieldStatus = ref( 'default' );
		const messages = { error: 'Please select an option' };
		const textFieldMessages = { error: '"Other" option must be provided' };
		function validate() {
			// When "other" radio is selected, ensure the custom input has a value.
			if ( radioValue.value === 'other' ) {
				return otherInputValue.value.length > 0;
			} else if ( radioValue.value.length > 0 ) {
				// When a radio other than "other" is selected.
				return true;
			} else {
				// When no radio is selected, validation fails.
				return false;
			}
		}

		function onSubmit() {
			// When validation is successful, show the success message.
			if ( validate() ) {
				status.value = 'default';
				textFieldStatus.value = 'default';
				// eslint-disable-next-line no-alert
				alert( 'Validation successful!' );
			// When validation is unsuccessful, show an error state.
			} else if ( radioValue.value === 'other' && otherInputValue.value.length === 0 ) {
				// When "other" is selected and text field is empty, show text field's error state.
				textFieldStatus.value = 'error';
			} else {
				// When validation is not successful (no selected radio), show the error state.
				status.value = 'error';
			}
		}

		watch( radioValue, () => {
			if ( validate() ) {
				// Reset the statuses when radio selection changes.
				status.value = 'default';
				textFieldStatus.value = 'default';
			} else if ( radioValue.value.length > 0 ) {
				// When validation is unsuceessful, reset the statuses when any radio
				// including "other" is selected.
				status.value = 'default';
				textFieldStatus.value = 'default';
			}
		} );

		watch( otherInputValue, () => {
			if ( validate() ) {
				// Reset the statuses when input changes.
				status.value = 'default';
				textFieldStatus.value = 'default';
			}
		} );

		return {
			radioValue,
			radios,
			otherInputValue,
			status,
			messages,
			validate,
			textFieldStatus,
			textFieldMessages,
			onSubmit
		};
	}
} );
</script>

<style lang="less">
@import ( reference ) '@wikimedia/codex-design-tokens/theme-wikimedia-ui.less';

.my-button {
	margin-top: @spacing-100;
}

.my-custom-input-field {
	.cdx-label {
		padding: 0;
	}

	.cdx-field__help-text {
		margin: 0;
	}
}

</style>

MediaWiki

<template>
	<!-- Note: This form does not POST or GET on submit -->
	<form
		id="block-expiration"
		name="expiration-form"
	>
		<cdx-field
			:is-fieldset="true"
			:status="status"
			:messages="messages"
			form="block-expiration"
		>
			<template #label>
				Expiration
			</template>
			<template #description>
				When do you want the block to expire?
			</template>
			<cdx-radio
				v-for="radio in radios"
				:key="'radio-' + radio.value"
				v-model="radioValue"
				name="radio-with-custom-input-demo"
				:input-value="radio.value"
				@change="validate( $event )"
			>
				{{ radio.label }}
				<template v-if="radio.value === 'other'" #custom-input>
					<cdx-field
						:is-fieldset="true"
						:status="textFieldStatus"
						:messages="textFieldMessages"
						class="my-custom-input-field"
					>
						<cdx-text-input
							v-model="otherInputValue"
							aria-label="TextInput custom input"
							placeholder="Custom duration..."
							:disabled="radioValue !== 'other'"
						></cdx-text-input>
					</cdx-field>
				</template>
			</cdx-radio>
		</cdx-field>
		<cdx-button
			class="my-button"
			action="progressive"
			weight="primary"
			form="block-expiration"
			name="submit-expiration"
			type="submit"
			@click.prevent="onSubmit"
		>
			Submit
		</cdx-button>
	</form>
</template>

<script>
const { defineComponent, ref, watch } = require( 'vue' );
const { CdxRadio, CdxField, CdxTextInput, CdxButton } = require( '@wikimedia/codex' );

module.exports = defineComponent( {
	name: 'RadiosWithCustomInput',
	components: { CdxRadio, CdxField, CdxTextInput, CdxButton },
	setup() {
		const radioValue = ref( '' );
		const radios = [
			{
				label: 'Preset duration',
				value: 'preset'
			},
			{
				label: 'Specific date and time',
				value: 'specific'
			},
			{
				label: 'Other duration',
				value: 'other'
			}
		];
		const otherInputValue = ref( '' );

		// Validation
		const status = ref( 'default' );
		const textFieldStatus = ref( 'default' );
		const messages = { error: 'Please select an option' };
		const textFieldMessages = { error: '"Other" option must be provided' };
		function validate() {
			// When "other" radio is selected, ensure the custom input has a value.
			if ( radioValue.value === 'other' ) {
				return otherInputValue.value.length > 0;
			} else if ( radioValue.value.length > 0 ) {
				// When a radio other than "other" is selected.
				return true;
			} else {
				// When no radio is selected, validation fails.
				return false;
			}
		}

		function onSubmit() {
			// When validation is successful, show the success message.
			if ( validate() ) {
				status.value = 'default';
				textFieldStatus.value = 'default';
				// eslint-disable-next-line no-alert
				alert( 'Validation successful!' );
			// When validation is unsuccessful, show an error state.
			} else if ( radioValue.value === 'other' && otherInputValue.value.length === 0 ) {
				// When "other" is selected and text field is empty, show text field's error state.
				textFieldStatus.value = 'error';
			} else {
				// When validation is not successful (no selected radio), show the error state.
				status.value = 'error';
			}
		}

		watch( radioValue, () => {
			if ( validate() ) {
				// Reset the statuses when radio selection changes.
				status.value = 'default';
				textFieldStatus.value = 'default';
			} else if ( radioValue.value.length > 0 ) {
				// When validation is unsuceessful, reset the statuses when any radio
				// including "other" is selected.
				status.value = 'default';
				textFieldStatus.value = 'default';
			}
		} );

		watch( otherInputValue, () => {
			if ( validate() ) {
				// Reset the statuses when input changes.
				status.value = 'default';
				textFieldStatus.value = 'default';
			}
		} );

		return {
			radioValue,
			radios,
			otherInputValue,
			status,
			messages,
			validate,
			textFieldStatus,
			textFieldMessages,
			onSubmit
		};
	}
} );
</script>

<style lang="less">
@import 'mediawiki.skin.variables.less';

.my-button {
	margin-top: @spacing-100;
}

.my-custom-input-field {
	.cdx-label {
		padding: 0;
	}

	.cdx-field__help-text {
		margin: 0;
	}
}

</style>

Vue usage

Typical use of this component will involve using v-for to loop through an array of items and output a Radio component for each one. Each Radio will have the same v-model binding and name prop, but different inputValue props and label content.
The v-model value is the inputValue of the Radio that is currently on.

Props

Prop name	Description	Type	Default
modelValue	Value of the currently selected radio. Provided by v-model binding in the parent component.	string|number|boolean	''
inputValue	HTML "value" attribute to assign to the input. Required for input groups.	string|number|boolean	false
name(required)	HTML "name" attribute to assign to the input.	string
disabled	Whether the disabled attribute should be added to the input.	boolean	false
inline	Whether the component should display inline. By default, display: block is set and a margin exists between sibling components, for a stacked layout.	boolean	false

Events

Event name	Properties	Description
update:modelValue	modelValue string|number|boolean - The new model value	Emitted when modelValue changes.

Slots

Name	Description	Bindings
default	Label text.
description	Short description text.
custom-input	Custom input.

CSS-only version

Markup structure

Radio 1

<div class="cdx-radio">
  <!-- <input> element with id, type, name, and any other necessary
	attributes. The actual input is visually hidden. -->
  <input
    id="radio-css-only-1"
    class="cdx-radio__input"
    type="radio"
    name="radio-css-only"
  />
  <!-- Empty span that will be styled to look like a radio input. -->
  <span class="cdx-radio__icon"></span>
  <div class="cdx-radio__label cdx-label">
    <!-- Label with `for` attribute matching the input's id. -->
    <label for="radio-css-only-1" class="cdx-label__label">
      <span class="cdx-label__label__text"> Radio 1 </span>
    </label>
  </div>
</div>

With description

To add a description below the label:

• Add a <span> after the <label> element with an ID and class cdx-label__description. Include the description text here.
• Add an aria-describedby attribute to the <input> element with the value of the ID of the description

Search completion

Default (recommended) Corrects up to two typos. Removes redirects that are very similar to the main title.

Strict mode (advanced) No typo correction. No accent folding. Strict matching.

<fieldset class="cdx-field">
  <legend class="cdx-label">
    <span class="cdx-label__label__text">Search completion</span>
  </legend>
  <div class="cdx-field__control">
    <div class="cdx-radio">
      <input
        id="radio-group-css-only-description-1"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only-description"
        aria-describedby="cdx-description-css-1"
        checked
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label
          for="radio-group-css-only-description-1"
          class="cdx-label__label"
        >
          <span class="cdx-label__label__text"> Default (recommended) </span>
        </label>
        <span id="cdx-description-css-1" class="cdx-label__description">
          Corrects up to two typos. Removes redirects that are very similar to
          the main title.
        </span>
      </div>
    </div>
    <div class="cdx-radio">
      <input
        id="radio-group-css-only-description-2"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only-description"
        aria-describedby="cdx-description-css-2"
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label
          for="radio-group-css-only-description-2"
          class="cdx-label__label"
        >
          <span class="cdx-label__label__text"> Strict mode (advanced) </span>
        </label>
        <span id="cdx-description-css-2" class="cdx-label__description">
          No typo correction. No accent folding. Strict matching.
        </span>
      </div>
    </div>
  </div>
</fieldset>

Radio group

Native attributes of the <input> element can be used. For example:

• Add the checked attribute to the <input> element if it should be selected initially.
• Add the disabled attribute to the <input> element if it should be disabled.

Always include one of these two features for accessible grouping:

1. If using the Radio group in a field, wrap the group in a <fieldset> element and add a <legend> element with the group label. This method is demonstrated below and requires some style resets on <fieldset> and <legend>. You can use the CSS-only Field and Label components to reset browser styles of these elements.
2. If using the Radio group outside of a field, wrap the group in a <div> with role="group" and aria-labelledby set to the ID of the group label. See an example of this above.

CSS-only Radio group demo

Radio 1

Radio 2 (initially selected)

Radio 3, which has a very long label that spans onto a second line to demonstrate what happens when text wraps

Radio 4 (disabled)

<fieldset class="cdx-field">
  <legend class="cdx-label">
    <span class="cdx-label__label__text">CSS-only Radio group demo</span>
  </legend>
  <div class="cdx-field__control">
    <div class="cdx-radio">
      <input
        id="radio-group-css-only-1"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only"
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label for="radio-group-css-only-1" class="cdx-label__label">
          <span class="cdx-label__label__text"> Radio 1 </span>
        </label>
      </div>
    </div>
    <div class="cdx-radio">
      <input
        id="radio-group-css-only-2"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only"
        checked
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label for="radio-group-css-only-2" class="cdx-label__label">
          <span class="cdx-label__label__text">
            Radio 2 (initially selected)
          </span>
        </label>
      </div>
    </div>
    <div class="cdx-radio">
      <input
        id="radio-group-css-only-3"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only"
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label for="radio-group-css-only-3" class="cdx-label__label">
          <span class="cdx-label__label__text">
            Radio 3, which has a very long label that spans onto a second line
            to demonstrate what happens when text wraps
          </span>
        </label>
      </div>
    </div>
    <div class="cdx-radio">
      <input
        id="radio-group-css-only-4"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only"
        disabled
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label for="radio-group-css-only-4" class="cdx-label__label">
          <span class="cdx-label__label__text"> Radio 4 (disabled) </span>
        </label>
      </div>
    </div>
  </div>
</fieldset>

Inline radios

Add the cdx-radio--inline class to the root element to get an inline layout.

CSS-only inline Radio demo

Radio 1

Radio 2

<fieldset class="cdx-field">
  <legend class="cdx-label">
    <span class="cdx-label__label__text">CSS-only inline Radio demo</span>
  </legend>
  <div class="cdx-field__control">
    <div class="cdx-radio cdx-radio--inline">
      <input
        id="radio-group-css-only-inline-1"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only-inline"
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label for="radio-group-css-only-inline-1" class="cdx-label__label">
          <span class="cdx-label__label__text"> Radio 1 </span>
        </label>
      </div>
    </div>
    <div class="cdx-radio cdx-radio--inline">
      <input
        id="radio-group-css-only-inline-2"
        class="cdx-radio__input"
        type="radio"
        name="radio-group-css-only-inline"
        checked
      />
      <span class="cdx-radio__icon"></span>
      <div class="cdx-radio__label cdx-label">
        <label for="radio-group-css-only-inline-2" class="cdx-label__label">
          <span class="cdx-label__label__text"> Radio 2 </span>
        </label>
      </div>
    </div>
  </div>
</fieldset>