| # Building | |
| You can build Next.js, including all type definitions and packages, with: | |
| ```bash | |
| pnpm build | |
| ``` | |
| > [!TIP] | |
| > Next.js uses [taskr](https://www.npmjs.com/package/taskr) to parallelize the build tasks. | |
| > The tasks can be found in the [`taskfile.js`](../../packages/next/taskfile.js) file, and each task name refers to the name of the function to execute. | |
| > For example, `taskr release` will execute the `release()` function in the `taskfile.js` file. | |
| The build process consists of the three main tasks: | |
| - [Compile the TypeScript sources with SWC](#compile-the-typescript-sources-with-swc) | |
| - [Bundle the project with Webpack](#bundle-the-project-with-webpack) | |
| - [Generate the type definitions](#generate-the-type-definitions) | |
| ### Compile the TypeScript Sources with SWC | |
| By default, the latest canary of the `next-swc` binaries will be installed and used to compile the TypeScript sources of the project. These sources are meant to be built inside the `packages/next/dist/...` directory. The outputs will include compiled JavaScript files and source maps. | |
| ### Bundle the Project with Webpack | |
| Based on the outputs of the compilation, the project is then bundled with Webpack. The configuration can be found in the [`next-runtime.webpack-config.js`](../../packages/next/next-runtime.webpack-config.js) file. | |
| ### Generate the Type Definitions | |
| The type definitions are generated using the TypeScript [`tsc`](https://www.typescriptlang.org/docs/handbook/compiler-options.html) compiler. You can build them separately with `pnpm types`. The [`tsconfig.build.json`](../../packages/next/tsconfig.build.json) is used which extends the base [`tsconfig.json`](../../packages/next/tsconfig.json) but excludes test files and other unneeded type definitions. | |
| ## Working on Turbopack, WASM, and other Rust code | |
| If you are actively working on Rust code or you need to test out the most recent Rust code that hasn't been published as a canary yet, you can [install Rust](https://www.rust-lang.org/tools/install) and run `pnpm swc-build-native`. | |
| If you want to test out the wasm build locally, you will need to [install wasm-pack](https://rustwasm.github.io/wasm-pack/installer/). Run `pnpm --filter=@next/swc build-wasm --target <wasm_target>` to build and `node ./scripts/setup-wasm.mjs` to copy it into your `node_modules`. Run next with `NODE_OPTIONS='--no-addons'` to force it to use the wasm binary. | |
| If you need to clean the project for any reason, use `pnpm clean`. | |