rollup-publish.config.js

// import path from "path";
import analyze from "rollup-plugin-analyzer";
import bundleSize from "rollup-plugin-bundle-size";
import commonjs from "@rollup/plugin-commonjs";
import resolve from "@rollup/plugin-node-resolve";
import svelte from "rollup-plugin-svelte";
import { terser } from "rollup-plugin-terser";
import pkg from "./package.json";
const smelte = require("./rollup-plugin-smelte");

const production = !process.env.ROLLUP_WATCH;

const { name } = pkg;

export default {
  input: "src/index.js",
  output: [
    {
      file: pkg.module,
      format: "es",
      sourcemap: true,
      name
    },
    {
      file: pkg.main,
      format: "umd",
      sourcemap: true,
      name
    }
  ],
  plugins: [
    svelte({
      dev: !production,
      emitCss: true,
      hydratable: true
    }),
    smelte({
      purge: true,
      whitelistPatterns: [
        // for JS ripple
        /ripple/,
        // date picker
        /w\-.\/7/
      ]
    }),
    resolve(),
    commonjs(),
    production && terser(),
    production && analyze(),
    production && bundleSize()
  ]
};