rollup.config.js

import postcss from "rollup-plugin-postcss";
import { terser } from "rollup-plugin-terser";

export default [
  {
    input: "src/index.js",
    output: [
      {
        file: "dist/index.esm.js",
        format: "esm",
        sourcemap: true
      },
      {
        file: "dist/index.umd.js",
        format: "umd",
        name: "leopard",
        sourcemap: true
      }
    ],
    plugins: [
      terser({
        output: {
          comments: (node, comment) => {
            // Keep license comments in the minified output
            if (comment.type === "comment2") {
              return /license/i.test(comment.value);
            }
            return false;
          }
        }
      })
    ]
  },
  {
    input: "src/index.css",
    output: {
      file: "dist/index.min.css"
    },
    plugins: [
      postcss({
        modules: false,
        extract: true,
        minimize: true
      })
    ]
  }
];