rollup.web.config.mjs

import babel from '@rollup/plugin-babel'
import {nodeResolve} from '@rollup/plugin-node-resolve'
import replace from '@rollup/plugin-replace'
import cleanup from 'rollup-plugin-cleanup'
import {uglify} from 'rollup-plugin-uglify'

const extensions = ['.js']

export default {
  plugins: [
    replace({
      preventAssignment: true,
      'process.env.NODE_ENV': JSON.stringify('production'),
    }),
    nodeResolve({
      extensions,
      browser: true,
      preferBuiltins: true,
    }),
    cleanup(),
    babel({
      babelHelpers: 'bundled',
      extensions,
      exclude: ['node_modules/**'],
      presets: [['@babel/preset-env', {targets: {ie: '11'}}]],
    }),
    uglify({
      compress: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
      },
      warnings: false,
    }),
  ],
  input: 'rambda.js',
  output: [
    {
      file: './dist/rambda.umd.js',
      format: 'umd',
      name: 'R',
    },
  ],
}