114 lines
2.6 KiB
Markdown
114 lines
2.6 KiB
Markdown
The JS plugin contains executors and generators that are useful for JavaScript/TypeScript projects in an Nx workspace.
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## Setting Up JS
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### Installation
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{% callout type="note" title="Keep Nx Package Versions In Sync" %}
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Make sure to install the `@nx/js` version that matches the version of `nx` in your repository. If the version numbers get out of sync, you can encounter some difficult to debug errors. You can [fix Nx version mismatches with this recipe](/recipes/tips-n-tricks/keep-nx-versions-in-sync).
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{% /callout %}
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In any Nx workspace, you can install `@nx/js` by running the following commands if `@nx/js` package is not installed:
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{% tabs %}
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{%tab label="npm"%}
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```shell
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npm i --save-dev @nx/js
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```
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{% /tab %}
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{%tab label="yarn"%}
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```shell
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yarn add --dev @nx/js
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```
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{% /tab %}
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{% /tabs %}
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### `ts` Preset
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When initializing a new Nx workspace, specifying `--preset=ts` will generate a workspace with `@nx/js` pre-installed.
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{% tabs %}
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{%tab label="npm"%}
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```shell
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npx create-nx-workspace my-org --preset=ts
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```
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{% /tab %}
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{%tab label="yarn"%}
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```shell
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yarn create nx-workspace my-org --preset=ts
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```
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{% /tab %}
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{% /tabs %}
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## Create Libraries
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You can add a new JS/TS library with the following command:
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```shell
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nx g @nx/js:lib my-lib
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```
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## Build
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You can `build` libraries that are generated with a bundler specified.
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```shell
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nx g @nx/js:lib my-buildable-lib --bundler=rollup
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```
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Generating a library with `--bundler` specified will add a `build` target to the library's `project.json` file allows the library to be built.
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```shell
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nx build my-buildable-lib
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```
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## Test
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You can test a library with the following command:
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```shell
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nx test my-lib
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```
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## Lint
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You can lint a library with the following command:
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```shell
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nx lint my-lib
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```
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## Compiler
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By default, `@nx/js` uses [TypeScript Compiler (TSC)](https://www.typescriptlang.org/docs/handbook/2/basic-types.html#tsc-the-typescript-compiler), via `@nx/js:tsc` executor, to compile your libraries. Optionally, you can switch `tsc` out for a different compiler with `--compiler` flag when executing the generators.
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Currently, `@nx/js` supports the following compilers:
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- [Speedy Web Compiler (SWC)](https://swc.rs)
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### SWC
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- Create a buildable library with `swc`
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```shell
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nx g @nx/js:lib my-swc-lib --bundler=swc
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```
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- Convert a `tsc` library to use `swc`
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```shell
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nx g @nx/js:convert-to-swc my-buildable-lib
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```
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Now the `build` command will use `@nx/js:swc` executor to compile your libraries.
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> The first time you generate a `swc` library or convert a `tsc` library over to `swc`, `@nx/js` will install the necessary dependencies to use `swc`.
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