某些环境变量可以安全地暴露给浏览器。这些变量通过 PUBLIC_ 前缀与私有环境变量区分开来。
在 .env 中添加两个公共环境变量：
PUBLIC_THEME_BACKGROUND="steelblue"
PUBLIC_THEME_FOREGROUND="bisque"然后，在 src/routes/+page.svelte 中导入它们：
src/routes/+page
<script>
const PUBLIC_THEME_BACKGROUND = 'white';
const PUBLIC_THEME_FOREGROUND = 'black';
import {
PUBLIC_THEME_BACKGROUND,
PUBLIC_THEME_FOREGROUND
} from '$env/static/public';
</script><script lang="ts">
const PUBLIC_THEME_BACKGROUND = 'white';
const PUBLIC_THEME_FOREGROUND = 'black';
import {
PUBLIC_THEME_BACKGROUND,
PUBLIC_THEME_FOREGROUND
} from '$env/static/public';
</script>1
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<script>
const PUBLIC_THEME_BACKGROUND = 'white';
const PUBLIC_THEME_FOREGROUND = 'black';
</script>
<main
style:background={PUBLIC_THEME_BACKGROUND} style:color={PUBLIC_THEME_FOREGROUND}>
{PUBLIC_THEME_FOREGROUND} on {PUBLIC_THEME_BACKGROUND}</main>
<style>
main {position: fixed;
display: flex;
align-items: center;
justify-content: center;
left: 0;
top: 0;
width: 100%;
height: 100%;
font-size: 10vmin;
}
</style>