rollup.config.js

// based on https://github.com/antfu/utils/blob/main/rollup.config.js
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 alias from "@rollup/plugin-alias"

const entries = [
  "src/index.ts",
]

const plugins = [
  alias({
    entries: [
      { find: /^node:(.+)$/, replacement: "$1" },
    ],
  }),
  resolve({
    preferBuiltins: true,
  }),
  json(),
  commonjs(),
  esbuild({
    target: "node14",
  }),
]

export default [
  ...entries.map(input => ({
    input,
    output: [
      {
        file: input.replace("src/", "dist/").replace(".ts", ".mjs"),
        format: "esm",
      },
      {
        file: input.replace("src/", "dist/").replace(".ts", ".cjs"),
        format: "cjs",
      },
    ],
    external: [],
    plugins,
  })),
  ...entries.map(input => ({
    input,
    output: {
      file: input.replace("src/", "").replace(".ts", ".d.ts"),
      format: "esm",
    },
    external: [],
    plugins: [
      dts({ respectExternal: true }),
    ],
  })),
]