<AccordionGroup multiple={false} header={true}>
<AccordionItem class="card">
<div slot="header" class="p-4">
<h5>Accordion 1</h5>
</div>
<div slot="content" class="card-body p-4">
The content
</div>
</AccordionItem>
</AccordionGroup>
Created
August 1, 2020 23:37
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Svelte accordion based on Bootstrap Collapse.
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<script> | |
import { setContext } from 'svelte'; | |
export let multiple = false | |
export let header = true | |
const items = new Set() | |
setContext('accordion', { | |
getMultiple: () => multiple, | |
getHeader: () => header, | |
getItems: () => items, | |
addItem: item => items.add(item), | |
deleteItem: item => items.delete(item), | |
}) | |
</script> | |
<div class="accordion-group"> | |
<slot /> | |
</div> |
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<script> | |
import { onMount, getContext, createEventDispatcher, tick } from 'svelte'; | |
export let className = '' | |
export {className as class} | |
const { | |
getMultiple, | |
getHeader, | |
getItems, | |
addItem, | |
deleteItem | |
} = getContext('accordion') | |
const multiple = getMultiple() | |
const header = getHeader() | |
const items = getItems() | |
const dispatch = createEventDispatcher(); | |
let show = false | |
let collapsing = false | |
let height = null | |
let content = null | |
$: heightStyle = height !== null ? `height: ${height}px;` : '' | |
function collapse() { | |
height = content.scrollHeight | |
collapsing = true | |
show = false | |
setTimeout(() => { | |
height = null | |
}, 5) | |
setTimeout(() => { | |
show = false | |
collapsing = false | |
}, 200) | |
} | |
async function toggle() { | |
if (collapsing) return | |
if (!show) { | |
if (!multiple) { | |
items.forEach(item => { | |
if (item !== collapse) { | |
item() | |
} | |
}) | |
} | |
collapsing = true | |
await tick() | |
height = content.scrollHeight | |
setTimeout(() => { | |
show = true | |
height = null | |
collapsing = false | |
}, 200) | |
} else { | |
collapse() | |
} | |
dispatch('toggle', show) | |
} | |
onMount(() => { | |
addItem(collapse) | |
return () => { | |
deleteItem(collapse) | |
} | |
}) | |
</script> | |
<div class={'accordion-item ' + className}> | |
{#if header} | |
<div class="accordion-header" on:click={toggle}> | |
<slot name="header" /> | |
</div> | |
{/if} | |
<div class="accordion-content" class:show class:collapsing style={heightStyle} bind:this={content}> | |
<div class="accordion-content-inner"> | |
<slot name="content" /> | |
</div> | |
</div> | |
</div> | |
<style lang="css"> | |
.accordion-header { | |
cursor: pointer; | |
} | |
.accordion-item.show > .accordion-header, | |
.accordion-header:hover { | |
background-color: #f2f2f2; | |
} | |
.accordion-content { | |
transition: height 200ms ease; | |
} | |
.accordion-content:not(.show):not(.collapsing) { | |
display: none; | |
} | |
.accordion-content.collapsing { | |
height: 0; | |
overflow: hidden; | |
} | |
</style> |
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