rollup.config.mjs

import json from "@rollup/plugin-json";
import resolve from "@rollup/plugin-node-resolve";
import terser from "@rollup/plugin-terser";
import typescript from "@rollup/plugin-typescript";
import bundleSize from "rollup-plugin-bundle-size";

import pkg from "./package.json" assert { type: "json" };

const plugins = (declaration) => [
  resolve(),
  json(),
  typescript({
    compilerOptions: {
      outDir: "build",
      declaration,
      declarationMap: declaration,
    },
  }),
  bundleSize(),
];

const outputs = [
  {
    input: "src/index.ts",
    output: {
      file: pkg.module,
      format: "esm",
      sourcemap: true,
    },
    plugins: plugins(true),
    external: Object.keys(pkg.dependencies),
  },
  {
    input: "src/index.ts",
    output: [
      {
        file: pkg.main,
        format: "umd",
        name: "vegaTooltip",
        exports: "named",
        sourcemap: true,
        globals: {
          "vega-util": "vega",
        },
      },
      {
        file: pkg.unpkg,
        format: "umd",
        name: "vegaTooltip",
        exports: "named",
        sourcemap: true,
        globals: {
          "vega-util": "vega",
        },
        plugins: [terser()],
      },
    ],
    plugins: plugins(false),
    external: ["vega-util"],
  },
];

export default outputs;