<svelte:head> 元素允许你在文档的 <head> 内插入元素。这对于 <title> 和 <meta> 标签等内容很有用，这些标签对于良好的 SEO 至关重要。
¥The <svelte:head> element allows you to insert elements inside the <head> of your document. This is useful for things like <title> and <meta> tags, which are critical for good SEO.
由于在本教程的上下文中很难展示这些内容，我们将它用于不同的目的 - 加载样式表。
¥Since those are quite hard to show in the context of this tutorial, we’ll use it for a different purpose — loading stylesheets.
App
<script>
const themes = ['margaritaville', 'retrowave', 'spaaaaace', 'halloween'];
let selected = $state(themes[0]);
</script>
<svelte:head>
<link rel="stylesheet" href="/tutorial/stylesheets/{selected}.css" />
</svelte:head>
<h1>Welcome to my site!</h1><script lang="ts">
const themes = ['margaritaville', 'retrowave', 'spaaaaace', 'halloween'];
let selected = $state(themes[0]);
</script>
<svelte:head>
<link rel="stylesheet" href="/tutorial/stylesheets/{selected}.css" />
</svelte:head>
<h1>Welcome to my site!</h1>在服务器端渲染 (SSR) 模式下，
<svelte:head>的内容将与其余 HTML 分开返回。
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<script>
const themes = ['margaritaville', 'retrowave', 'spaaaaace', 'halloween'];
let selected = $state(themes[0]);
</script>
<h1>Welcome to my site!</h1>
<select bind:value={selected}><option disabled>choose a theme</option>
{#each themes as theme} <option>{theme}</option> {/each}</select>