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Part 3 / Special elements / <svelte:component>

A component can change its category altogether with <svelte:component>. Instead of a sequence of if blocks...

{#if selected.color === 'red'}
	<RedThing/>
{:else if selected.color === 'green'}
	<GreenThing/>
{:else if selected.color === 'blue'}
	<BlueThing/>
{/if}

...we can have a single dynamic component:

<svelte:component this={selected.component}/>

The this value can be any component constructor, or a falsy value — if it's falsy, no component is rendered.

Next: <svelte:element>

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<script>
	import RedThing from './RedThing.svelte';
	import GreenThing from './GreenThing.svelte';
	import BlueThing from './BlueThing.svelte';
 
	const options = [
		{ color: 'red', component: RedThing },
		{ color: 'green', component: GreenThing },
		{ color: 'blue', component: BlueThing }
	];
 
	let selected = options[0];
</script>
 
<select bind:value={selected}>
	{#each options as option}
		<option value={option}>{option.color}</option>
	{/each}
</select>
 
{#if selected.color === 'red'}
	<RedThing />
{:else if selected.color === 'green'}
	<GreenThing />
{:else if selected.color === 'blue'}
	<BlueThing />
{/if}
initialising