webpack4新建一个项目

Create a new directory

　　mkdir webpack-4-quickstart

Initialize a package.json by running:

　　npm init -y

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1",
    "dev": "webpack --mode development",
    "build": "webpack --mode production",
    "server": "webpack-dev-server --config webpack.config.js"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.6.1",
    "css-loader": "^0.28.11",
    "html-webpack-plugin": "^3.1.0",
    "style-loader": "^0.20.3",
    "webpack": "^4.2.0",
    "webpack-cli": "^2.0.13",
    "webpack-dev-server": "^3.1.1"
  }
}

安装以上配置文件里没有的包

npm i -D 包名

 加载自定义文件

const webpack=require("webpack")
const HtmlWepackPlugin = require('html-webpack-plugin');
const path = require('path');
module.exports={
    entry:{
        index:path.resolve(__dirname,'src/entry.js')
    },
    output: {
        filename: '[name].[hash].js',
        path: path.resolve(__dirname, 'dist'),
        publicPath: '/dist/'
      },
      module: {
        rules: [
          {test: /.js$/, use: ['babel-loader']},
          {test: /.css$/, use: ['style-loader', 'css-loader']}
        ]
      },
      plugins: [
        new HtmlWepackPlugin({
          filename: './index.html',
          template: './template.html'
        })
      ]
}

文件目录如下：