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<details
class="cdx-accordion"
:class="rootClasses"
@toggle="onToggle"
>
<summary>
<component
:is="headingLevel"
class="cdx-accordion__header"
>
<span class="cdx-accordion__header__title">
<!-- @slot Customizable Accordion title-->
<slot name="title" />
</span>
<span class="cdx-accordion__header__description">
<!-- @slot Customizable Accordion description-->
<slot name="description" />
</span>
</component>
<cdx-button
v-if="shouldShowActionButton"
class="cdx-accordion__action"
:aria-label="actionButtonLabel"
type="button"
weight="quiet"
@click.stop="emitActionButtonClick"
>
<cdx-icon
:icon="actionIcon"
:icon-label="actionButtonLabel"
size="medium"
/>
</cdx-button>
</summary>
<div class="cdx-accordion__content" @click.stop>
<!-- @slot Customizable Accordion content -->
<slot />
</div>
</details>
</template>
<script lang="ts">
import { computed, defineComponent, PropType, ref } from 'vue';
import CdxIcon from '../../components/icon/Icon.vue';
import CdxButton from '../../components/button/Button.vue';
import { Icon } from '@wikimedia/codex-icons';
import { HeadingLevel } from '../../types';
/**
* An item that contains an expandable and collapsible section of content.
*/
export default defineComponent( {
name: 'CdxAccordion',
components: { CdxButton, CdxIcon },
props: {
/**
* Forces the accordion to show the action icon.
*
* @values 'true', 'false'
*/
actionAlwaysVisible: {
type: Boolean,
default: false
},
/**
* The icon that will be displayed on the right side of the accordion header when expanded.
*
*/
actionIcon: {
type: [ String, Object ] as PropType<Icon>,
default: null
},
/**
* Label for the action button. If an action icon is being used, then a label for that icon
* should be provided for ARIA support.
*/
actionButtonLabel: {
type: String,
default: ''
},
/**
* The heading level of the accordion title.
*
* @values 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'
*/
headingLevel: {
type: String as PropType<HeadingLevel>,
default: 'h3'
}
},
emits: [
/**
* When the action button is clicked.
*
*/
'action-button-click'
],
setup( props, { attrs, emit } ) {
const isExpanded = ref<boolean>( 'open' in attrs );
const emitActionButtonClick = (): void => {
emit( 'action-button-click' );
};
const onToggle = ( e: ToggleEvent ): void => {
isExpanded.value = e.newState === 'open';
};
const shouldShowActionButton = computed( () => {
return props.actionIcon && ( isExpanded.value || props.actionAlwaysVisible );
} );
const rootClasses = computed( () => ( {
'cdx-accordion--has-icon': shouldShowActionButton.value
} ) );
return {
emitActionButtonClick,
rootClasses,
shouldShowActionButton,
onToggle
};
}
} );
</script>
<style lang="less">
@import ( reference ) '@wikimedia/codex-design-tokens/theme-wikimedia-ui.less';
@import ( reference ) '../../themes/mixins/public/css-icon.less';
.cdx-accordion {
position: relative;
border-bottom: @border-subtle;
// The summary element is always visible
& > summary {
background-color: @background-color-transparent;
list-style: none; // disable the built-in indicator icon since we're providing our own
display: flex;
gap: @spacing-50;
border-width: @border-width-base;
border-style: @border-style-base;
border-color: @border-color-transparent;
border-radius: @border-radius-sharp;
padding: @spacing-75;
word-break: break-word;
white-space: normal;
transition-property: @transition-property-base;
transition-duration: @transition-duration-medium;
transition-timing-function: @transition-timing-function-system;
&:hover {
background-color: @background-color-interactive-subtle;
cursor: @cursor-base--hover;
}
&:active {
background-color: @background-color-interactive;
}
&:focus-visible {
box-shadow: @box-shadow-inset-medium @border-color-progressive;
outline: @outline-base--focus;
}
&:focus:not( :active ) {
border-color: @border-color-progressive--focus;
box-shadow: @box-shadow-inset-small @box-shadow-color-progressive--focus;
}
// Most browsers remove the default indicator triangle icon when
// list-style is set to none on the summary element. But webkit requires
// this vendor-specific override as well. We are providing our own Codex
// Icon instead of the browser-supplied default for this purpose.
&::-webkit-details-marker {
display: none;
}
}
// Add specificity to override heading styles.
& &__header {
position: relative;
margin-top: 0;
margin-bottom: 0;
border-top: 0;
padding-top: 0;
padding-bottom: 0;
// Hack to reset font-size to the default for the heading level.
// TODO: Decide if we set custom heading levels all the to the same size out of box.
font-size: @font-size-medium;
&__title {
display: flex;
gap: @spacing-50;
line-height: @line-height-xx-small;
}
&__description {
color: @color-subtle;
display: flex;
font-weight: @font-weight-normal;
line-height: @line-height-xx-small;
pointer-events: none;
}
}
&__action.cdx-button {
display: flex;
align-items: center;
position: absolute;
top: 0;
right: 0;
// Align the icon with the text by making it as tall as the text, plus 2 times the distance
// between the edge of the button and the text (which is @spacing-75 for the padding and
// @border-width-base for the button border)
height: calc( unit( @line-height-xx-small, em ) + 2*@spacing-75 + 2*@border-width-base );
padding-right: @spacing-75;
padding-left: @spacing-75;
// Set the font-size so that the em-based height calculation above works correctly
font-size: @font-size-medium;
&:hover {
background-color: unset;
}
}
&__content {
padding: @spacing-50 @spacing-75 @spacing-75;
font-size: @font-size-medium;
}
// Indicator icon
& > summary::before {
content: '';
.cdx-mixin-css-icon( @cdx-icon-expand, @param-size-icon: @size-icon-small );
height: unit( @line-height-xx-small, em );
transition-property: @transition-property-toggle-switch-grip;
transition-duration: @transition-duration-medium;
transition-timing-function: @transition-timing-function-system;
}
&[ open ] > summary::before {
transform: rotate( -180deg );
}
}
</style>
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