@vitejs/plugin-react-swc

What is @vitejs/plugin-react-swc?

@vitejs/plugin-react-swc is a Vite plugin that enables the use of React with the SWC (Speedy Web Compiler) compiler. This plugin provides faster build times and improved performance for React applications by leveraging SWC's capabilities.

What are @vitejs/plugin-react-swc's main functionalities?

Basic Setup

This code demonstrates how to include the @vitejs/plugin-react-swc plugin in a Vite configuration file. This setup allows Vite to use SWC for compiling React code.

```json
{
  "plugins": [
    "@vitejs/plugin-react-swc"
  ]
}
```

Custom SWC Configuration

This code sample shows how to customize the SWC configuration within the Vite plugin. It configures SWC to parse TypeScript and use the automatic JSX runtime.

```json
{
  "plugins": [
    ["@vitejs/plugin-react-swc", {
      "jsc": {
        "parser": {
          "syntax": "typescript",
          "tsx": true
        },
        "transform": {
          "react": {
            "runtime": "automatic"
          }
        }
      }
    }]
  ]
}
```

Other packages similar to @vitejs/plugin-react-swc

@vitejs/plugin-react

@vitejs/plugin-react is another Vite plugin for React, but it uses Babel instead of SWC for compilation. While it is more mature and has broader support for various Babel plugins, it may not offer the same performance benefits as SWC.

vite-plugin-swc

vite-plugin-swc is a general-purpose SWC plugin for Vite that can be used with various frameworks, including React. It provides similar performance benefits as @vitejs/plugin-react-swc but requires more manual configuration for React-specific features.

README

@vitejs/plugin-react-swc

Speed up your Vite dev server with SWC

• ✅ A fast Fast Refresh (~20x faster than Babel)
• ✅ Enable automatic JSX runtime

⚠️ This is a beta release for Vite 4, for the v2 named vite-plugin-swc-react-refresh, see the v2 branch.

Installation

npm i -D @vitejs/plugin-react-swc

Usage

import { defineConfig } from "vite";
import react from "@vitejs/plugin-react-swc";

export default defineConfig({
  plugins: [react()],
});

Caveats

This plugin is only used in development and aims to be kept simple to enable good performances and be transpiler agnostic. Here is the list of non-configurable options that impact runtime behaviour:

• useDefineForClassFields is always activated, as this matches the current ECMAScript spec
• jsx runtime is always automatic
• In development:
  • esbuild is disabled, so the esbuild configuration has no effect
  • target is es2020
  • JS files are not transformed
  • tsconfig is not resolved, so properties other than the ones listed above behaves like TS defaults

Consistent components exports

For React refresh to work correctly, your file should only export React components. The best explanation I've read is the one from the Gatsby docs.

If an incompatible change in exports is found, the module will be invalidated and HMR will propagate. To make it easier to export simple constants alongside your component, the module is only invalidated when their value changes.

You can catch mistakes and get more detailed warning with this eslint rule.