如何构建生产代码以及如何使用它

Question

我对webpack非常陌生，我发现在生产构建中我们可以减少整体代码的大小。目前，webpack构建了大约8MB的文件，main.js构建了大约5MB的文件。如何在生产构建中减少代码的大小？我从internet上找到了一个示例webpack配置文件，并为我的应用程序进行了配置，然后运行npm run build，它开始构建，它在./dist/目录中生成了一些文件。

null

{
  "name": "MyAPP",
  "version": "0.1.0",
  "description": "",
  "main": "src/server/server.js",
  "repository": {
    "type": "git",
    "url": ""
  },
  "keywords": [
  ],
  "author": "Iam",
  "license": "MIT",
  "homepage": "http://example.com",
  "scripts": {
    "test": "",
    "start": "babel-node src/server/bin/server",
    "build": "rimraf dist && NODE_ENV=production webpack --config ./webpack.production.config.js --progress --profile --colors"
  },
  "dependencies": {
    "scripts" : "", ...
  },
  "devDependencies": {
    "scripts" : "", ...
  }
}

webpack.config.js

var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var public_dir = "src/frontend";
var ModernizrWebpackPlugin = require('modernizr-webpack-plugin');

module.exports = {
  devtool: 'eval-source-map',
  entry: [
    'webpack-hot-middleware/client?reload=true',
    path.join(__dirname, public_dir , 'main.js')
  ],
  output: {
    path: path.join(__dirname, '/dist/'),
    filename: '[name].js',
    publicPath: '/'
  },
  plugins: [
    plugins
  ],
  module: {
    loaders: [loaders]
  }
};

webpack.production.config.js

var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var public_dir = "src/frontend";
var ModernizrWebpackPlugin = require('modernizr-webpack-plugin');
console.log(path.join(__dirname, 'src/frontend' , 'index.html'));

module.exports = {
  devtool: 'eval-source-map',
  entry: [
    'webpack-hot-middleware/client?reload=true',
    path.join(__dirname, 'src/frontend' , 'main.js')
  ],
  output: {
    path: path.join(__dirname, '/dist/'),
    filename: '[name].js',
    publicPath: '/'
  },
  plugins: [plugins],
  resolve: {
    root: [path.resolve('./src/frontend/utils'), path.resolve('./src/frontend')],
    extensions: ['', '.js', '.css']
  },

  module: {
    loaders: [loaders]
  }
};

Answer 1

你可以按照@vikramaditya的建议添加插件。然后生成生产构建。您必须运行该命令

NODE_ENV=production webpack --config ./webpack.production.config.js

如果使用babel，还需要在上面的命令前缀babel_env=node。