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Advanced reactivity
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<script module>
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Conclusion

Sometimes you don’t know in advance which element needs to be rendered. Rather than having a long list of {#if ...} blocks...

App
{#if selected === 'h1'}
	<h1>I'm a <code>&lt;h1&gt;</code> element</h1>
{:else}
	<p>TODO others</p>
{/if}

...we can use <svelte:element>:

App
<svelte:element this={selected}>
	I'm a <code>&lt;{selected}&gt;</code> element
</svelte:element>

The this value can be any string, or a falsy value — if it’s falsy, no element is rendered.

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<script>
	const options = ['h1', 'h2', 'h3', 'p', 'marquee'];
	let selected = $state(options[0]);
</script>
 
<select bind:value={selected}>
	{#each options as option}
		<option value={option}>{option}</option>
	{/each}
</select>
 
{#if selected === 'h1'}
	<h1>I'm a <code>&lt;h1&gt;</code> element</h1>
{:else}
	<p>TODO others</p>
{/if}