rollup terser babel gulp打包js

gulpfile.babel.js加入：

var gulp = require('gulp');
var rollup = require('rollup');
import resolve from '@rollup/plugin-node-resolve';
import babel from '@rollup/plugin-babel';
import commonjs from '@rollup/plugin-commonjs';
import {terser} from 'rollup-plugin-terser';

var paths = {
  scripts: {
    src: 'src/scripts/**/*.js',
    dest: 'dist/scripts/'
  }
};

/*
 * Define our tasks using plain functions
 */
function scripts() {
  return rollup.rollup({
    input: './src/scripts/main.js',
    plugins: [
      resolve(),
      commonjs(),
      babel({ babelHelpers: 'bundled' }),
      terser({
        keep_fnames: true,
        format: {
          quote_style:1
        }
      })
    ]
  }).then(bundle => {
    return bundle.write({
      file: './dist/scripts/main.js',
      format: 'iife',
      name: 'main',
      sourcemap: true
    });
  });
}


function watch() {
  gulp.watch(paths.scripts.src, scripts);
}

/*
 * Specify if tasks run in series or parallel using `gulp.series` and `gulp.parallel`
 */
// var build = gulp.series(clean, gulp.parallel(styles, scripts));
var build = gulp.series(gulp.parallel(scripts,watch));

/*
 * You can use CommonJS `exports` module notation to declare tasks
 */
exports.scripts = scripts;
exports.watch = watch;
exports.build = build;
/*
 * Define default task that can be called by just running `gulp` from cli
 */
exports.default = build;

.babelrc.json加入：

{
  "presets": [ "@babel/preset-env" ]
}