@wyw-in-js/bun

The package contains WyW-in-JS plugin for Bun bundler.

Installation

# npm
npm i -D @wyw-in-js/bun
# yarn
yarn add --dev @wyw-in-js/bun
# pnpm
pnpm add -D @wyw-in-js/bun
# bun
bun add -d @wyw-in-js/bun

Usage

import wyw from '@wyw-in-js/bun';

await Bun.build({
  entrypoints: ['src/index.ts'],
  outdir: 'dist',
  plugins: [wyw()],
});

Eval resolver modes

eval.resolver: 'native' and the native step of eval.resolver: 'hybrid' use oxc-resolver with automatic tsconfig.json discovery.

The Bun plugin does not receive a static bundler alias map. Use hybrid when evaluated imports may rely on Bun-specific resolution. Use native only when oxc-resolver can resolve all evaluated imports, or mirror Bun-only aliases in oxcOptions.resolver.alias.

Transforming libraries in node_modules

By default, the Bun plugin skips transforming files from node_modules for performance.

To transform a specific library, enable transformLibraries and narrow include/exclude:

wyw({
  transformLibraries: true,
  include: [/node_modules\\/(?:@fluentui)\\//],
});

Disabling vendor prefixing

Stylis adds vendor-prefixed CSS by default. To disable it (and reduce CSS size), pass prefixer: false:

wyw({
  prefixer: false,
});

To get details about supported options by the plugin, please check documentation.