@postcss-go/vite-loader

Vite plugin for @postcss-go/core. It processes CSS with the Go-backed engine before Vite's built-in CSS pipeline.

Install

npm i -D @postcss-go/core @postcss-go/vite-loader vite

Usage

// vite.config.js
import postcssGo from '@postcss-go/vite-loader';
import autoprefixer from 'autoprefixer';

export default {
  plugins: [
    postcssGo({
      postcssOptions: {
        config: false,
        plugins: [autoprefixer()],
      },
    }),
  ],
};

postcssOptions can also be a synchronous or asynchronous function. It receives mode, env, file, viteConfig, and the plugin options.

When postcssOptions.config is omitted, the plugin searches from each input file for a configuration format supported by @postcss-go/core. Set it to false to disable lookup or to a path (resolved from Vite's root) for an explicit config file.

Source maps default to Vite's css.devSourcemap in development and build.sourcemap in builds. The plugin returns maps from its transform hook; downstream Vite/Rolldown CSS handling decides whether they become separate .css.map files in the build output. Warnings, watched dependencies, and emitted assets are forwarded to Vite. The plugin processes .css, .pcss, and .postcss requests (including query strings such as ?inline); preprocessors such as Sass and Less remain Vite's responsibility and are not run through postcss-go.

Unless css.postcss is explicitly present in the Vite config, the plugin sets it to an empty plugin list so Vite does not discover and run the same postcss.config.* plugins a second time.