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webpack2使用ch6-babel使用 处理es6 优化编译速度

1 目录结构

安装依赖

cnpm install --save-dev babel-loader babel-core babel-preset-env babel-preset-latest

"babel-core": "^6.24.0", "babel-loader": "^6.4.1", "babel-preset-env": "^1.3.2", "babel-preset-latest": "^6.24.0",

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2 webpack.config.js

 

const webpack = require(‘webpack‘),      htmlWebpackPlugin = require(‘html-webpack-plugin‘),      path = require(‘path‘);module.exports = {    entry: ‘./src/app.js‘,    output: {        path: path.resolve(__dirname, ‘./dist‘),        filename: ‘js/[name]-[chunkhash].js‘,    },    module: { //loader第三种使用方式 配置项设置 其他1引入 2cli      loaders: [          {              test: ‘/\.js$/‘,  //正则匹配.js文件              loader: ‘babel‘,  //使用babel 要先安装 cnpm install --save-dev babel-loader babel-core              exclude: path.resolve(__dirname, ‘node_modules‘), //优化babel 排除              include: path.resolve(__dirname, ‘src‘),//优化babel 打包范围              query: {                  presets: [‘env‘] //使用方式之1 cnpm install --save-dev babel-preset-env 告诉babel如何处理 //方式2 package.json中指定 方式3 cli运行时指定              }          },      ]    },    plugins: [        new htmlWebpackPlugin({            filename: ‘index.html‘,            template: ‘index.html‘,            inject: ‘body‘        })    ]};

 

3 app.js

import layer from ‘./components/layer/layer.js‘const  App = function () {    console.log(layer);}new App();

4 layer.js

//import tpl from ‘layer.html‘;function layer() {    return {        name: ‘layer‘,        tpl: tpl    }};export default layer;

5 打包

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6 验证是否成功

http://localhost:63342/web/webpack-demo/dist/index.html 运行

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webpack2使用ch6-babel使用 处理es6 优化编译速度