怎樣運用webpack打包JS

GitHub 我們一同進修webpack地點:https://github.com/liangfengbo/learning-webpack

怎樣運用webpack打包JS

我們在敕令行中輸入:webpack -h看看webpack的敕令行大全

Usage: webpack-cli [options]
       webpack-cli [options] --entry <entry> --output <output>
       webpack-cli [options] <entries...> --output <output>

webpack通知我們,用webpack舉行打包有三種要領:

1.新建為webpack.config.js定名的文件,能夠直接webpack敕令打包

2.webpack 進口文件<app.js> -o 輸出文件<bundle.js>

3.webpack --config 你自定義的文件名字<webpack-default.js>

新建一個目次,新建一個sum.js文件,這個文件主假如用es6 module暴露一個加法函數要領:

// sum.js
export default function sum(a, b) {
    return a + b;
}

然後新建一個app.js進口文件(webpack要打包這個文件)

// app.js

// es6 module範例
import sum from './sum'

// 挪用
console.log('sum(23,24) = ', sum(23, 24));

下面舉行打包:

webpack app.js -o bundle.js

假如打包勝利顯現:

Hash: 7e137d767d2665688484
Version: webpack 4.5.0
Time: 588ms
Built at: 2018-6-20 20:30:06
      Asset       Size  Chunks             Chunk Names
0.bundle.js  188 bytes       0  [emitted]
  bundle.js   1.84 KiB       1  [emitted]  main
Entrypoint main = bundle.js
   [0] ./app.js + 1 modules 466 bytes {1} [built]
       | ./app.js 411 bytes [built]
       | ./sum.js 55 bytes [built]
   [1] ./minus.js 54 bytes {1} [built]
   [2] ./muti.js 114 bytes {0} [built]
    原文作者:梁鳳波
    原文地址: https://segmentfault.com/a/1190000015339015
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