mirror of
https://github.com/nuxt/nuxt.git
synced 2024-11-11 16:43:55 +00:00
94 lines
2.7 KiB
Markdown
94 lines
2.7 KiB
Markdown
---
|
|
navigation.icon: IconFile
|
|
title: app.config.ts
|
|
head.title: 'app.config.ts'
|
|
description: Nuxt 3 provides the app.config file to expose reactive configuration within your application.
|
|
---
|
|
|
|
# App Config File
|
|
|
|
Nuxt 3 provides an `app.config` config file to expose reactive configuration within your application with the ability to update it at runtime within lifecycle or using a nuxt plugin and editing it with HMR (hot-module-replacement).
|
|
|
|
You can easily provide runtime app configuration using `app.config.ts` file. It can have either of `.ts`, `.js`, or `.mjs` extensions.
|
|
|
|
```ts [app.config.ts]
|
|
export default defineAppConfig({
|
|
foo: 'bar'
|
|
})
|
|
```
|
|
|
|
::alert{type=warning}
|
|
Do not put any secret values inside `app.config` file. It is exposed to the user client bundle.
|
|
::
|
|
|
|
## Defining App Config
|
|
|
|
To expose config and environment variables to the rest of your app, you will need to define configuration in `app.config` file.
|
|
|
|
**Example:**
|
|
|
|
```ts [app.config.ts]
|
|
export default defineAppConfig({
|
|
theme: {
|
|
primaryColor: '#ababab'
|
|
}
|
|
})
|
|
```
|
|
|
|
When adding `theme` to the `app.config`, Nuxt uses Vite or webpack to bundle the code. We can universally access `theme` both when server-rendering the page and in the browser using [useAppConfig](/docs/api/composables/use-app-config) composable.
|
|
|
|
```js
|
|
const appConfig = useAppConfig()
|
|
|
|
console.log(appConfig.theme)
|
|
```
|
|
|
|
### Manually Typing App Config
|
|
|
|
Nuxt tries to automatically generate a TypeScript interface from provided app config.
|
|
|
|
It is also possible to type app config manually. There are two possible things you might want to type.
|
|
|
|
#### Typing App Config Input
|
|
|
|
`AppConfigInput` might be used by module authors who are declaring what valid _input_ options are when setting app config. This will not affect the type of `useAppConfig()`.
|
|
|
|
```ts [index.d.ts]
|
|
declare module 'nuxt/schema' {
|
|
interface AppConfigInput {
|
|
/** Theme configuration */
|
|
theme?: {
|
|
/** Primary app color */
|
|
primaryColor?: string
|
|
}
|
|
}
|
|
}
|
|
|
|
// It is always important to ensure you import/export something when augmenting a type
|
|
export {}
|
|
```
|
|
|
|
#### Typing App Config Output
|
|
|
|
If you want to type the result of calling `useAppConfig()`, then you will want to extend `AppConfig`.
|
|
|
|
::alert{type=warning}
|
|
Be careful when typing `AppConfig` as you will overwrite the types Nuxt infers from your actually defined app config.
|
|
::
|
|
|
|
```ts [index.d.ts]
|
|
declare module 'nuxt/schema' {
|
|
interface AppConfig {
|
|
// This will entirely replace the existing inferred `theme` property
|
|
theme: {
|
|
// You might want to type this value to add more specific types than Nuxt can infer,
|
|
// such as string literal types
|
|
primaryColor?: 'red' | 'blue'
|
|
}
|
|
}
|
|
}
|
|
|
|
// It is always important to ensure you import/export something when augmenting a type
|
|
export {}
|
|
```
|