gulp5.js

import webpack from 'webpack';

gulp.task('compile-js', ['compile-css'], (cb) => (
  webpack({
    entry: './src/index',
    output: {
      path: './dist',
      filename: 'index.js',
    },
    module: {
      loaders: [
        {
          test: /\.js$/,
          exclude: /node_modules/,
          loader: 'babel',
        },
      ],
    },
  }, err => {
    cb(err);
  })
));

gulp.task('default', ['compile-js']);