mirror of https://github.com/vuejs/vitepress
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
3.1 KiB
120 lines
3.1 KiB
---
|
|
outline: deep
|
|
---
|
|
|
|
# SSR Compatibility
|
|
|
|
VitePress pre-renders the app in Node.js during the production build, using Vue's Server-Side Rendering (SSR) capabilities. This means all custom code in theme components are subject to SSR Compatibility.
|
|
|
|
The [SSR section in official Vue docs](https://vuejs.org/guide/scaling-up/ssr.html) provides more context on what is SSR, the relationship between SSR / SSG, and common notes on writing SSR-friendly code. The rule of thumb is to only access browser / DOM APIs in `beforeMount` or `mounted` hooks of Vue components.
|
|
|
|
## `<ClientOnly>`
|
|
|
|
If you are using or demoing components that are not SSR-friendly (for example, contain custom directives), you can wrap them inside the built-in `<ClientOnly>` component:
|
|
|
|
```md
|
|
<ClientOnly>
|
|
<NonSSRFriendlyComponent />
|
|
</ClientOnly>
|
|
```
|
|
|
|
## Libraries that Access Browser API on Import
|
|
|
|
Some components or libraries access browser APIs **on import**. To use code that assumes a browser environment on import, you need to dynamically import them.
|
|
|
|
### Importing in Mounted Hook
|
|
|
|
```vue
|
|
<script setup>
|
|
import { onMounted } from 'vue'
|
|
|
|
onMounted(() => {
|
|
import('./lib-that-access-window-on-import').then((module) => {
|
|
// use code
|
|
})
|
|
})
|
|
</script>
|
|
```
|
|
|
|
### Conditional Import
|
|
|
|
You can also conditionally import a dependency using the `import.meta.env.SSR` flag (part of [Vite env variables](https://vitejs.dev/guide/env-and-mode.html#env-variables)):
|
|
|
|
```js
|
|
if (!import.meta.env.SSR) {
|
|
import('./lib-that-access-window-on-import').then((module) => {
|
|
// use code
|
|
})
|
|
}
|
|
```
|
|
|
|
Since [`Theme.enhanceApp`](./custom-theme#theme-interface) can be async, you can conditionally import and register Vue plugins that access browser APIs on import:
|
|
|
|
```js
|
|
// .vitepress/theme/index.js
|
|
export default {
|
|
// ...
|
|
async enhanceApp({ app }) {
|
|
if (!import.meta.env.SSR) {
|
|
const plugin = await import('plugin-that-access-window-on-import')
|
|
app.use(plugin)
|
|
}
|
|
}
|
|
}
|
|
```
|
|
|
|
### `defineClientComponent`
|
|
|
|
VitePress provides a convenience helper for importing Vue components that access browser APIs on import.
|
|
|
|
```vue
|
|
<script setup>
|
|
import { defineClientComponent } from 'vitepress'
|
|
|
|
const ClientComp = defineClientComponent(() => {
|
|
return import('component-that-access-window-on-import')
|
|
})
|
|
</script>
|
|
|
|
<template>
|
|
<ClientComp />
|
|
</template>
|
|
```
|
|
|
|
You can also pass props/children/slots to the target component:
|
|
|
|
```vue
|
|
<script setup>
|
|
import { ref } from 'vue'
|
|
import { defineClientComponent } from 'vitepress'
|
|
|
|
const clientCompRef = ref(null)
|
|
const ClientComp = defineClientComponent(
|
|
() => import('component-that-access-window-on-import'),
|
|
|
|
// args are passed to h() - https://vuejs.org/api/render-function.html#h
|
|
[
|
|
{
|
|
ref: clientCompRef
|
|
},
|
|
{
|
|
default: () => 'default slot',
|
|
foo: () => h('div', 'foo'),
|
|
bar: () => [h('span', 'one'), h('span', 'two')]
|
|
}
|
|
],
|
|
|
|
// callback after the component is loaded, can be async
|
|
() => {
|
|
console.log(clientCompRef.value)
|
|
}
|
|
)
|
|
</script>
|
|
|
|
<template>
|
|
<ClientComp />
|
|
</template>
|
|
```
|
|
|
|
The target component will only be imported in the mounted hook of the wrapper component.
|