Svelte基础
Advanced Svelte
Advanced reactivity
Motion
Advanced bindings
Advanced transitions
Context API
Special elements
<script module>
Next steps
Basic SvelteKit
Introduction
Routing
Loading data
Headers and cookies
Shared modules
API routes
$app/state
Errors and redirects
Advanced SvelteKit
Page options
Link options
Advanced routing
Advanced loading
Environment variables
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><h1></code> element</h1>
{:else}
<p>TODO others</p>
{/if}...we can use <svelte:element>:
App
<svelte:element this={selected}>
I'm a <code><{selected}></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><h1></code> element</h1>
{:else}<p>TODO others</p>
{/if}