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<span class="cdx-radio" :class="rootClasses">
<input
:id="radioId"
ref="input"
v-model="wrappedModel"
class="cdx-radio__input"
type="radio"
:aria-describedby="( $slots.description &&
$slots.description().length > 0 ) ? descriptionId : undefined"
:name="name"
:value="inputValue"
:disabled="computedDisabled"
>
<span class="cdx-radio__icon" />
<!-- Only render a Label component if label text has been provided. This component can also
supply a description to the Radio if content is provided in the description slot. -->
<cdx-label
v-if="$slots.default && $slots.default().length"
class="cdx-radio__label"
:input-id="radioId"
:description-id="( $slots.description &&
$slots.description().length > 0 ) ? descriptionId : undefined"
:disabled="computedDisabled"
@click="focusInput"
>
<!-- @slot Label text. -->
<slot />
<template v-if="$slots.description && $slots.description().length > 0" #description>
<!-- @slot Short description text. -->
<slot name="description" />
</template>
</cdx-label>
</span>
</template>
<script lang="ts">
import { defineComponent, ref, toRef, computed } from 'vue';
import CdxLabel from '../label/Label.vue';
import useLabelChecker from '../../composables/useLabelChecker';
import useModelWrapper from '../../composables/useModelWrapper';
import useGeneratedId from '../../composables/useGeneratedId';
import useFieldData from '../../composables/useFieldData';
/**
* A binary input that is usually combined in a group of two or more options.
*/
export default defineComponent( {
name: 'CdxRadio',
components: { CdxLabel },
props: {
/**
* Value of the currently selected radio.
*
* Provided by `v-model` binding in the parent component.
*/
modelValue: {
type: [ String, Number, Boolean ],
default: ''
},
/**
* HTML "value" attribute to assign to the input.
*
* Required for input groups.
*/
inputValue: {
type: [ String, Number, Boolean ],
default: false
},
/**
* HTML "name" attribute to assign to the input.
*/
name: {
type: String,
required: true
},
/**
* Whether the disabled attribute should be added to the input.
*/
disabled: {
type: Boolean,
default: false
},
/**
* Whether the component should display inline.
*
* By default, `display: block` is set and a margin exists between
* sibling components, for a stacked layout.
*/
inline: {
type: Boolean,
default: false
}
},
emits: [
/**
* Emitted when modelValue changes.
*
* @property {string | number | boolean} modelValue The new model value
*/
'update:modelValue'
],
setup( props, { emit, slots, attrs } ) {
useLabelChecker( slots.default?.(), attrs, 'CdxRadio' );
const rootClasses = computed( (): Record<string, boolean> => {
return {
'cdx-radio--inline': props.inline
};
} );
const { computedDisabled } = useFieldData( toRef( props, 'disabled' ) );
// Declare template ref.
const input = ref<HTMLInputElement>();
const radioId = useGeneratedId( 'radio' );
const descriptionId = useGeneratedId( 'description' );
/**
* When the label is clicked, focus on the input.
*
* This doesn't happen automatically in Firefox or Safari.
*/
const focusInput = (): void => {
// This method only gets called when the label is interacted with,
// so we can be confident that the input ref also exists.
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
input.value!.focus();
};
// Take the modelValue provided by the parent component via v-model and
// generate a wrapped model that we can use for the input element in
// this component.
const wrappedModel = useModelWrapper( toRef( props, 'modelValue' ), emit );
return {
rootClasses,
computedDisabled,
input,
radioId,
descriptionId,
focusInput,
wrappedModel
};
}
} );
</script>
<style lang="less">
@import ( reference ) '@wikimedia/codex-design-tokens/theme-wikimedia-ui.less';
@import ( reference ) '../../themes/mixins/binary-input.less';
.cdx-radio {
// Common binary input styles.
.cdx-mixin-binary-input();
// Custom-styled radio that's visible to the user.
&__icon {
border-radius: @border-radius-circle;
// Add `:focus` state's inner circle.
&::before {
content: ' ';
position: absolute;
top: -@size-25;
right: -@size-25;
bottom: -@size-25;
left: -@size-25;
border: @border-width-base @border-style-base @border-color-transparent;
border-radius: @border-radius-circle;
}
}
// HTML `<input type="radio">`.
// Based on the HTML attributes of the radio input, we can change the style of the adjacent
// `span`, which will look like a custom-styled radio.
&__input {
&:enabled {
& + .cdx-radio__icon {
border-color: @border-color-input-binary;
}
// Note: there is no focus behavior for the input in its unchecked state because you
// can't focus on it without selecting it.
&:hover + .cdx-radio__icon {
border-color: @border-color-input-binary--hover;
}
&:active + .cdx-radio__icon {
background-color: @background-color-progressive--active;
border-color: @border-color-progressive--active;
}
&:focus + .cdx-radio__icon {
border-color: @border-color-input-binary--focus;
box-shadow: @box-shadow-inset-small @box-shadow-color-progressive--focus;
}
&:checked {
& + .cdx-radio__icon {
border-width: @border-width-input-radio--checked;
border-color: @border-color-input-binary--checked;
}
&:hover + .cdx-radio__icon {
border-color: @border-color-input-binary--hover;
}
&:focus + .cdx-radio__icon {
&::before {
border-color: @border-color-inverted;
}
}
// Put `:active` after `:focus` at 'filled' progressive components. Otherwise a
// focus outline would be visible when actively clicked.
&:active + .cdx-radio__icon {
background-color: @background-color-base-fixed;
border-color: @border-color-progressive--active;
&::before {
border-color: @border-color-progressive--active;
}
}
}
}
/* stylelint-disable no-descending-specificity */
&:disabled {
// DEPRECATED: Support CSS-only components that don't set the `cdx-label` class on the
// label (T353885)
& ~ .cdx-radio__label,
& ~ .cdx-radio__label.cdx-label {
color: @color-disabled;
}
& + .cdx-radio__icon {
background-color: @background-color-disabled;
border-color: @border-color-disabled;
}
&:checked + .cdx-radio__icon {
border-width: @border-width-input-radio--checked;
}
}
/* stylelint-enable no-descending-specificity */
}
}
</style>
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