Hello Webpack

看知乎有人讨论不需要打包？难道你的软件免费别人吗？

cd ~/Workspace
mkdir helloworld
cd helloworld

安装webpack和CLI

yarn add webpack webpack-cli -D

See https://webpack.docschina.org/guides/getting-started/#basic-setup

安装webpack-node-externals

yarn add webpack-node-externals -D

See https://www.npmjs.com/package/webpack-node-externals

打包服务器端代码

See https://webpack.docschina.org/concepts/

创建webpack.config.js文件。

const nodeExternals = require("webpack-node-externals");
const path = require("path");

module.exports = {
  entry: "./src/main.js",
  output: {
    filename: "bundle.js",
    path: path.resolve(__dirname, "dist"),
  },
  target: "node",
  externals: [nodeExternals()],
};

修改package.json：

{
  "main": "dist/bundle.js",
  //...
  "scripts": {
    "dev-build": "webpack --mode development --progress --watch",
    "build": "webpack --mode production --progress --watch",
    "dev": "set NODE_ENV=development && nodemon run",
    "run": "node run"
  },
  //...
}

• dev-build根据配置文件，用webpack将文件打包成bundle.js放到dist目录。
• build根据配置文件，用webpack将文件打包成bundle.js放到dist目录。
• dev通过nodemon运行。