esbuild-plugin-transform-ext

Esbuild plugin for changing file extensions in outputs

Esbuild provides some useful features for transforming file extensions: out-extension, resolve-extensions. But it lacks the ability to transform file extensions in the middle of the build process – in the bundles themselves.

Status

PoC

Usage

import { build, BuildOptions } from 'esbuild'
import { transformExtPlugin } from 'esbuild-plugin-transform-ext'

const plugin = transformExtPlugin({
  cwd: 'target/mjs', // defaults to build.initialOptions.absWorkingDir || process.cwd()
  rules: [
    {
      pattern: /\.cjs$/, // if not specified, the plugin will apply to all files
      map: { // defautls to build.initialOptions.outExtension
        '': '.cjs',
        '.js': '.cjs',
      }
    },
    {
      pattern: /\.mjs$/,
      map: {
        '.js': '.mjs',
      }
    }
  ]
})

const config: BuildOptions = {
  entryPoints: ['index.ts'],
  outdir: 'target/cjs',
  plugins: [plugin],
  outExtension: { '.js': '.cjs' },
  format: 'cjs'
}

await build(config)

Siblings

• depseek
• tsc-esm-fix
• tsc-dts-fix
• esbuild-plugin-transform-hook

License

MIT