webpack code splitting

一、代码分割优化

const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');  // 注入html
const CleanWebpackPlugin = require('clean-webpack-plugin');
const merge = require('webpack-merge');

const webpackBaseConf = require('./webpack.base.conf');
const webpackProConf = {
  mode: 'production',
  devtool: 'source-map',
  optimization: {
    runtimeChunk: 'single',
    splitChunks: {
      chunks: 'all',
      minSize: 30000,
      minChunks: 1,
      cacheGroups: {
        vendors: {
          test: /[\/]node_modules[\/]/,
          priority: -10
        },
        default: {
          minChunks: 2,
          priority: -20,
          reuseExistingChunk: true
        }
      }
    },
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'src/index.html'
    }),
    new CleanWebpackPlugin(),
    new webpack.HashedModuleIdsPlugin(), // 缓存
  ]

};

const webpackConfigs = merge(webpackBaseConf,webpackProConf);
module.exports= webpackConfigs;