mirror of https://github.com/nuxt/nuxt.git
124 lines
3.2 KiB
Markdown
124 lines
3.2 KiB
Markdown
# Bridge
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Experience Nuxt 3 features on existing Nuxt 2 projects.
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::alert
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If you're starting a fresh Nuxt 3 project, please skip this section and go to [Nuxt 3 Installation](/getting-started/installation).<br>
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Learn more in [Introduction](/getting-started/introduction).
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::
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Bridge is a forward-compatibility layer that allows you to experience many of new Nuxt 3 features by simply installing and enabling a Nuxt module.
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Using Nuxt Bridge, you can make sure your project is (almost) ready for Nuxt 3 and have the best developer experience without needing a major rewrite or risk breaking changes.
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### Upgrade Nuxt 2
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Remove any package lockfiles (`package-lock.json` and `yarn.lock`) and use the latest `nuxt-edge`:
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**package.json**
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```diff
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- "nuxt": "^2.15.0"
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+ "nuxt-edge": "latest"
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```
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Then, reinstall your dependencies:
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::code-group
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```bash [Yarn]
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yarn install
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```
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```bash [NPM]
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npm install
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```
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::
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::alert
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Once the installation is complete, make sure both development and production builds are working as expected before proceeding.
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::
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### Install Nuxt Bridge
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Install `@nuxt/bridge-edge` as a development dependency:
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::code-group
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```bash [Yarn]
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yarn add --dev @nuxt/bridge@npm:@nuxt/bridge-edge
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```
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```bash [NPM]
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npm install -D @nuxt/bridge@npm:@nuxt/bridge-edge
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```
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::
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### Update `nuxt.config`
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Please make sure to avoid any CommonJS syntax such as `module.exports`, `require` or `require.resolve` in your config file. It will soon be deprecated and unsupported.
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You can use static `import`, dynamic `import()` and `export default` instead. Using TypeScript by renaming to `nuxt.config.ts` is also possible and recommended.
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```ts [nuxt.config.js|ts]
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import { defineNuxtConfig } from '@nuxt/bridge'
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export default defineNuxtConfig({
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// Your existing configuration
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})
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```
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### Avoid CommonJS syntax
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Nuxt 3 natively supports TypeScript and ECMAScript Modules.
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#### Update the imports
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::code-group
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```js [Before]
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const lib = require('lib')
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```
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```js [After]
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import lib from 'lib'
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// or using code-splitting
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const lib = await import('lib').then(e => e.default || e)
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```
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::
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#### Update the exports
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::code-group
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```js [Before]
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module.exports = ...
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```
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```js [After]
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export default ...
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// or using named export
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export const hello = ...
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```
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::
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#### Avoid using specific CJS syntax
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Avoid the usage of `__dirname` and `__filename` as much as possible.
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### Remove incompatible and obsolete modules
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- Remove `@nuxt/content` (1.x). A rewrite for nuxt 3 is planned (2.x)
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- Remove `nuxt-vite`: Bridge enables same functionality
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- Remove `@nuxt/typescript-build`: Bridge enables same functionality
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- Remove `@nuxt/typescript-runtime` and `nuxt-ts`: Nuxt 2 has built-in runtime support
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- Remove `@nuxt/nitro`: Bridge injects same functionality
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- Remove `@nuxtjs/composition-api`: Bridge provides a Nuxt 3 compatible composition-api layer and help to remove dependency
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### Ensure everything goes well
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✔️ Try with `nuxt dev` and `nuxt build` (or `nuxt generate`) to see if everything goes well.
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🐛 Is something wrong? Please let us know by creating an issue. Also, you can easily disable bridge in the meantime:
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```ts [nuxt.config.js|ts]
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import { defineNuxtConfig } from '@nuxt/bridge'
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export default defineNuxtConfig({
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bridge: false // Temporarily disable bridge integration
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})
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```
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