docs(core): update ts migration recipe (#29815)

Updates migration to TS project references recipe
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Isaac Mann 2025-01-31 15:18:22 -05:00 committed by GitHub
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@ -11,7 +11,7 @@ Follow the specific instructions for your package manager to enable workspaces p
```json {% fileName="package.json" %}
{
"workspaces": ["apps/**", "libs/**"]
"workspaces": ["apps/*", "libs/*"]
}
```
@ -32,7 +32,7 @@ If you reference a local library project with its own `build` task, you should i
```json {% fileName="package.json" %}
{
"workspaces": ["apps/**", "libs/**"]
"workspaces": ["apps/*", "libs/*"]
}
```
@ -53,7 +53,7 @@ If you reference a local library project with its own `build` task, you should i
```json {% fileName="package.json" %}
{
"workspaces": ["apps/**", "libs/**"]
"workspaces": ["apps/*", "libs/*"]
}
```
@ -74,8 +74,8 @@ If you reference a local library project with its own `build` task, you should i
```yaml {% fileName="pnpm-workspace.yaml" %}
packages:
- 'apps/**'
- 'libs/**'
- 'apps/*'
- 'libs/*'
```
Defining the `packages` property in the root `pnpm-workspaces.yaml` file lets pnpm know to look for project `package.json` files in the specified folders. With this configuration in place, all the dependencies for the individual projects will be installed in the root `node_modules` folder when `pnpm install` is run in the root folder.
@ -172,26 +172,81 @@ The root `tsconfig.json` file should extend `tsconfig.base.json` and not include
{% /tab %}
{% /tabs %}
## Register Nx Typescript Plugin
Make sure that the `@nx/js` plugin is installed in your repository and `@nx/js/typescript` is registered as a plugin in the `nx.json` file.
```jsonc {% fileName="nx.json" %}
{
"plugins": [
{
"plugin": "@nx/js/typescript",
"options": {
"typecheck": {
"targetName": "typecheck"
},
"build": {
"targetName": "build",
"configName": "tsconfig.lib.json",
"buildDepsName": "build-deps",
"watchDepsName": "watch-deps"
}
}
}
]
}
```
This plugin will register a [sync generator](/concepts/sync-generators) to automatically maintain the project references across the repository.
## Create Individual Project package.json files
When using package manager project linking, every project needs to have a `package.json` file. You can leave all the task configuration in the existing `project.json` file. For application projects, you only need to specify the `name` property. For library projects, you should add an `exports` property that accounts for any TypeScript path aliases that referenced the project. A typical configuration is shown below:
{% tabs %}
{% tab label="Non-buildable library" %}
```json {% fileName="libs/ui/package.json" %}
{
"name": "@myorg/ui",
"exports": {
".": "./src/index.js"
".": {
"types": "./src/index.ts",
"import": "./src/index.ts",
"default": "./src/index.ts"
}
}
}
```
{% /tab %}
{% tab label="Buildable Library" %}
```json {% fileName="libs/ui/package.json" %}
{
"name": "@myorg/ui",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./dist/index.js",
"default": "./dist/index.js"
}
}
}
```
{% /tab %}
{% /tabs %}
{% callout type="warning" title="Package Names with Multiple Slashes" %}
The `package.json` name can only have one `/` character in it. This is more restrictive than the TypeScript path aliases. So if you have a project that you have been referencing with `@myorg/shared/ui`, you'll need to make the `package.json` name be something like `@myorg/shared-ui` and update all the import statements in your codebase to reference the new name.
{% /callout %}
## Update Individual Project TypeScript Configuration
Each project's `tsconfig.json` file should extend the `tsconfig.base.json` file and list `references` to the project's dependencies.
Each project's `tsconfig.json` file should extend the `tsconfig.base.json` file and list `references` to the project's dependencies. Remove any `compilerOptions` listed and combine them with the options listed in the `tsconfig.lib.json` and `tsconfig.spec.json` files.
The `tsconfig.json` file's purpose is to provide your IDE with `references` to the `tsconfig.*.json` files that define the compilation settings for all the files in the project. In this case, `tsconfig.spec.json` handles the compilation of the test files and `tsconfig.lib.json` handles the compilation of the production code.
```jsonc {% fileName="libs/ui/tsconfig.json" %}
{
@ -211,12 +266,18 @@ Each project's `tsconfig.json` file should extend the `tsconfig.base.json` file
}
```
Each project's `tsconfig.lib.json` file extends the project's `tsconfig.json` file and adds `references` to the `tsconfig.lib.json` files of project dependencies.
Each project's `tsconfig.lib.json` file extends the root `tsconfig.base.json` file and adds `references` to the `tsconfig.lib.json` files of project dependencies. This file should not extend the project's `tsconfig.json` file because the `tsconfig.json` file includes a reference to the `tsconfig.spec.json` file. Keeping the `tsconfig.spec.json` file unreferenced from the `tsconfig.lib.json` file makes the `typecheck` and `build` tasks faster because the test files do not need to be analyzed. Note that the `outDir` location needs to be unique across all `tsconfig.*.json` files so that one task's cached output does not interfere with another task's cached output.
{% callout type="note" title="Shared Compiler Options" %}
If there are a lot of shared `compilerOptions` between `tsconfig.lib.json` and `tsconfig.spec.json`, you could create a `tsconfig.project.json` that contains those shared settings. `tsconfig.project.json` would extend `tsconfig.base.json` while `tsconfig.lib.json` and `tsconfig.spec.json` would each extend `tsconfig.project.json`.
{% /callout %}
```jsonc {% fileName="libs/ui/tsconfig.lib.json" %}
{
"extends": "./tsconfig.json",
"extends": "../../tsconfig.base.json",
"compilerOptions": {
// outDir should be local to the project and not in the same folder as any other tsconfig.*.json
"outDir": "./out-tsc/lib"
// Any overrides
},
"include": ["src/**/*.ts"],
@ -230,12 +291,18 @@ Each project's `tsconfig.lib.json` file extends the project's `tsconfig.json` fi
}
```
{% callout type="note" title="Task Outputs Within the Project" %}
As part of this migration process, we are moving the task outputs for `typecheck` and `build` to be local to the project instead of being output to a root `dist` folder. This structure is more consistent with a workspaces style repository and helps to keep projects self-contained. It should be possible to continue to send task outputs to a root `dist` folder, but you'll need to make sure that the `outDir` and `exports` paths work correctly for your folder structure.
{% /callout %}
The project's `tsconfig.spec.json` does not need to reference project dependencies.
```jsonc {% fileName="libs/ui/tsconfig.spec.json" %}
{
"extends": "./tsconfig.json",
"extends": "../../tsconfig.base.json",
"compilerOptions": {
// outDir should be local to the project and not in the same folder as any other tsconfig.*.json
"outDir": "./out-tsc/spec"
// Any overrides
},
"include": [
@ -252,6 +319,42 @@ The project's `tsconfig.spec.json` does not need to reference project dependenci
After creating these `tsconfig.*.json` files, run `nx sync` to have Nx automatically add the correct references for each project.
### Vite Configuration Updates
If you are using Vite to build a project, you need to update the `vite.config.ts` file for each project.
1. Remove the `nxViteTsPaths` plugin from the `plugins` array.
2. Set the `build.outDir` to `./dist` relative to the project's folder.
3. Make sure the `build.lib.name` matches the full name of the project, including the organization.
```ts {% fileName="libs/ui/vite.config.ts" %}
import react from '@vitejs/plugin-react';
import dts from 'vite-plugin-dts';
import { nxCopyAssetsPlugin } from '@nx/vite/plugins/nx-copy-assets.plugin';
export default defineConfig({
// ...
plugins: [
// any needed plugins, but remove nxViteTsPaths
react(),
nxCopyAssetsPlugin(['*.md', 'package.json']),
dts({
entryRoot: 'src',
tsconfigPath: path.join(__dirname, 'tsconfig.lib.json'),
}),
],
build: {
// ...
outDir: './dist',
// ...
lib: {
name: '@myorg/ui',
// ...
},
},
});
```
## Future Plans
We realize that this manual migration process is tedious. We are investigating automating parts of this process with generators.