vitest/packages/browser/rollup.config.js

import { createRequire } from 'node:module'
import esbuild from 'rollup-plugin-esbuild'
import dts from 'rollup-plugin-dts'
import resolve from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'
import json from '@rollup/plugin-json'
import { defineConfig } from 'rollup'

const require = createRequire(import.meta.url)
const pkg = require('./package.json')

const external = [
  ...Object.keys(pkg.dependencies),
  ...Object.keys(pkg.peerDependencies || {}),
  /^@?vitest(\/|$)/,
  'worker_threads',
  'node:worker_threads',
]

const plugins = [
  resolve({
    preferBuiltins: true,
  }),
  json(),
  commonjs(),
  esbuild({
    target: 'node18',
  }),
]

const input = {
  index: './src/node/index.ts',
  providers: './src/node/providers/index.ts',
}

export default () => defineConfig([
  {
    input,
    output: {
      dir: 'dist',
      format: 'esm',
    },
    external,
    plugins,
  },
  {
    input: './src/client/context.ts',
    output: {
      file: 'dist/context.js',
      format: 'esm',
    },
    plugins: [
      esbuild({
        target: 'node18',
      }),
    ],
  },
  {
    input: input.index,
    output: {
      file: 'dist/index.d.ts',
      format: 'esm',
    },
    external,
    plugins: [dts()],
  },
])