Rollup config

rollup.config.js

import fs from 'fs';
import path from 'path';
// rollup.config.js
import builtins from 'rollup-plugin-node-builtins';
import globals from 'rollup-plugin-node-globals';
import babel from 'rollup-plugin-babel';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import replace from 'rollup-plugin-replace';
import uglify from 'rollup-plugin-uglify';
import { minify as esMinifier } from 'uglify-es';
import json from 'rollup-plugin-json';
import async from 'rollup-plugin-async';
import analyze from 'rollup-analyzer-plugin'
// PostCss
import postcss from 'rollup-plugin-postcss';
import simplevars from 'postcss-simple-vars';
import nested from 'postcss-nested';
import cssnext from 'postcss-cssnext';
import cssnano from 'cssnano';
import lost from 'lost';

const fileCopy = function (options) {
  return {
    ongenerate(){
      const targDir = path.dirname(options.targ);
      if (!fs.existsSync(targDir)){
        fs.mkdirSync(targDir);
      }
      fs.writeFileSync(options.targ, fs.readFileSync(options.src));
    }
  };
};

const ENV = process.env.NODE_ENV || 'development';