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fix(expandable-tile): set tile height using resize observer (#1738)

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* fix(expandable-tile): set tile max height using Resize Observer

* docs(expandable-tile): update and re-work examples
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Eric Liu 2023-06-02 10:08:25 -07:00 • committed by GitHub
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2 changed files with 45 additions and 13 deletions
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40
docs/src/pages/components/ExpandableTile.svx
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@ -3,7 +3,29 @@
import Preview from "../../components/Preview.svelte";
</script>
## Default (unexpanded)
## Default
This component uses a [resize observer](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) to determine the height of the above-the-fold content.
It's unexpanded by default.
<ExpandableTile>
<div slot="above">
<div>
Above the fold content here
</div>
<br />
<br />
<div>
More above the fold content
</div>
</div>
<div slot="below">Below the fold content here</div>
</ExpandableTile>
## Custom tile heights
Set a custom height for the tiles on the "above" and "below" slots.
<ExpandableTile>
<div slot="above" style="height: 10rem">Above the fold content here</div>
@ -13,22 +35,22 @@
## Expanded
<ExpandableTile expanded>
<div slot="above" style="height: 10rem">Above the fold content here</div>
<div slot="below" style="height: 10rem">Below the fold content here</div>
<div slot="above">Above the fold content here</div>
<div slot="below">Below the fold content here</div>
</ExpandableTile>
## Light variant
<ExpandableTile light>
<div slot="above" style="height: 10rem">Above the fold content here</div>
<div slot="below" style="height: 10rem">Below the fold content here</div>
<div slot="above">Above the fold content here</div>
<div slot="below">Below the fold content here</div>
</ExpandableTile>
## With icon labels
<ExpandableTile tileExpandedLabel="View less" tileCollapsedLabel="View more">
<div slot="above" style="height: 10rem">Above the fold content here</div>
<div slot="below" style="height: 10rem">Below the fold content here</div>
<div slot="above">Above the fold content here</div>
<div slot="below">Below the fold content here</div>
</ExpandableTile>
## With interactive content
@ -36,7 +58,7 @@
For tiles containing interactive content, use `stopPropagation` to prevent the tile from toggling.
<ExpandableTile tileExpandedLabel="View less" tileCollapsedLabel="View more">
<div slot="above" style="height: 10rem">
<div slot="above">
<a href="/" on:click|preventDefault|stopPropagation={() => console.log("Hello world")}>
Native element
</a>
@ -48,5 +70,5 @@ For tiles containing interactive content, use `stopPropagation` to prevent the t
Svelte component
</Button>
</div>
<div slot="below" style="height: 10rem">Below the fold content here</div>
<div slot="below">Below the fold content here</div>
</ExpandableTile>

18
src/Tile/ExpandableTile.svelte
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@ -32,11 +32,23 @@
/** Obtain a reference to the top-level element */
export let ref = null;
import { afterUpdate } from "svelte";
import { afterUpdate, onMount } from "svelte";
import ChevronDown from "../icons/ChevronDown.svelte";
let refAbove = null;
onMount(() => {
const resizeObserver = new ResizeObserver(([elem]) => {
tileMaxHeight = elem.contentRect.height;
});
resizeObserver.observe(refAbove);
return () => {
resizeObserver.disconnect();
};
});
afterUpdate(() => {
if (tileMaxHeight === 0) {
tileMaxHeight = refAbove.getBoundingClientRect().height;
@ -62,10 +74,8 @@
class:bx--tile--expandable="{true}"
class:bx--tile--is-expanded="{expanded}"
class:bx--tile--light="{light}"
style:max-height="{expanded ? "none" : `${tileMaxHeight + tilePadding}px`}"
{...$$restProps}
style="{expanded
? $$restProps.style
: `${$$restProps.style}; max-height: ${tileMaxHeight + tilePadding}px`}"
on:click
on:click="{() => {
expanded = !expanded;