rollup.config.js

import { nodeResolve } from "@rollup/plugin-node-resolve"
// import commonjs from '@rollup/plugin-commonjs'
import postcss from "rollup-plugin-postcss"
import fs from "fs"
import path from "path"

const pkg = JSON.parse(fs.readFileSync(path.join(__dirname, "./package.json"), { encoding: "utf8" }))
const dependencies = Object.keys(pkg.peerDependencies).concat(Object.keys(pkg.dependencies))

console.log(dependencies)

const aliases = {
  resolveId(importee) {
    if (importee === "yjs") {
      return `${process.cwd()}/node_modules/yjs/src/index.js`
    }
    return null
  },
}

export default [
  {
    input: "./src/y-monaco.js",
    output: [
      {
        name: "Y",
        file: "dist/y-monaco.cjs",
        format: "cjs",
        sourcemap: true,
      },
    ],
    external: (id) => dependencies.some((dep) => dep === id) || /^lib0\//.test(id),
  },
  {
    input: "./src/y-monaco.js",
    output: [
      {
        name: "Y",
        file: "dist/y-monaco.amd.js",
        format: "amd",
        sourcemap: true,
      },
    ],
    external: ["yjs"],
    plugins: [
      nodeResolve({
        browser: true,
        extensions: [".js", ".ts"],
        preferBuiltins: false,
        context: "window",
      }),
      postcss({
        plugins: [],
        extract: true,
        minimize: true,
      }),
    ],
  },
  {
    input: "./test/index.js",
    output: {
      name: "test",
      file: "dist/test.js",
      format: "esm",
      sourcemap: true,
      inlineDynamicImports: true,
    },
    external: (id) => /^(lib0|isomorphic\.js)\//.test(id) && id[0] !== "." && id[0] !== "/",
    plugins: [
      // debugResolve,
      aliases,
      nodeResolve(),
      postcss({
        plugins: [],
        extract: true,
      }),
    ],
  } /* {
  input: './test/index.js',
  output: {
    name: 'test',
    file: 'dist/test.js',
    format: 'esm',
    sourcemap: true,
    inlineDynamicImports: true
  },
  plugins: [
    // debugResolve,
    nodeResolve({
      mainFields: ['module', 'browser', 'main']
    }),
    commonjs(),
    postcss({
      plugins: [],
      extract: true
    })
  ]
} */,
]