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multi-env-html-webpack-plugin

v1.0.0

Published

generate multiples indexs by environments

Downloads

2

Readme

multi-env-html-webpack-plugin

这是一个webpack 插件。用来生成被注入了不同script脚本的html入口文件。通常用来生成单页面应用的不同环境的入口html文件,以避免构建不同环境的应用包需要进行多次构建过程时,例如:假设需要生成3个环境的应用包时,原来需要执行3次构建命令和构建过程。利用这个插件则可以进行1次构建,生成不同环境的入口index.html文件,在部署环境时仅需指定对应环境的入口文件即可。原理就是通过改变现有项目中的process.env通过webpack编译后的输出结果,让它变成一个全局变量,然后在项目的入口文件的所有脚本前面注入该全局变量。

安装

  • npm:

npm i multi-env-html-webpack-plugin -D

  • yarn:

yarn add multi-env-html-webpack-plugin -D

  • pnpm:

pnpm add multi-env-html-webpack-plugin -D

使用

// webpack 配置
const { getEnv, MultiEnvHtmlWebpackPlugin } = require("multi-env-html-webpack-plugin");
const path = require("path");
const globalEnvName='_env_'
module.exports = {
  // 第一步改变process.env编译后的输出结果

  //webpack项目:
  new webpack.DefinePlugin({
    "process.env":`window.${globalEnvName}`
  })
  

  // vue-cli项目

  config.plugin("define").tap(() => {
    return [
      {
        "process.env": `window.${globalEnvName}`,
      },
    ];
  });

  ...
  // 第二部配置插件,根据环境配置输出文件路径和对应的环境变量

  plugins:[
    //单页面应用
    new MultiEnvHtmlWebpackPlugin([{
      index:path.join(__dirname,"./dist/index.html"),
      outputs:[
        {
          data:{
            [`${globalEnvName}`]:getEnv("production"),//加载.env.*文件或者直接自己写入对象
          },
          file:path.join(__dirname,"./dist/index-production.html")
        },
        {
          data:{
            [`${globalEnvName}`]:getEnv("dev"),
          },
          file:path.join(__dirname,"./dist/index-dev.html")
        },
        {
          data:{
            [`${globalEnvName}`]:getEnv("test"),
          },
          file:path.join(__dirname,"./dist/index-test.html")
        },
        //process.env.mode 为构建时的环境参数,注意该项一定要放在最后,因为是按顺序进行的,前面的会读取index.html
        //(本地开发时,注意需确定入口文件index的路径或者添加环境判断在本地开发时不引入该插件),
        {
          data: { [`${globalEnvName}`]: getEnv(process.env.mode)},
          file: path.join(__dirname,"./dist/index.html",)
        },
      ]
      parent: "body",//全局变量的脚本挂载的父节点。脚本会挂载在该父节点的第一个子节点的位置。为可选配置,默认就是'body'选择器
    }]),


    //多页面应用
    new MultiEnvHtmlWebpackPlugin([
      {
        index:path.join(__dirname,"./dist/pc/index.html"),
        outputs:[ 
          {
            data:{
              [`${globalEnvName}`]:getEnv("production"),
            },
            file:path.join(__dirname,"./dist/index-production.html")
          },
          {
            data:{
              [`${globalEnvName}`]:getEnv("dev"),
            },
            file:path.join(__dirname,"./dist/index-dev.html")
          },
          //process.env.mode 为构建时的环境参数,注意该项一定要放在最后,因为是按顺序进行的,前面的会读取index.html
          //(本地开发时,注意需确定入口文件index的路径或者添加环境判断在本地开发时不引入该插件),
          {
            data: { [`${globalEnvName}`]: getEnv(process.env.mode)},
            file: path.join(__dirname,"./dist/pc/index.html",)
          },
        ]
      },
      {
        index:path.join(__dirname,"./dist/mobile/index.html"),
        outputs:[
          {
            data:{
              [`${globalEnvName}`]:getEnv("pro"),
            },
            file:path.join(__dirname,"./dist/mobile/index-pro.html")
          },
          {
            data:{
              [`${globalEnvName}`]:getEnv("dev"),
            },
            file:path.join(__dirname,"./dist/mobile/index-dev.html")
          },
        ]
      },
    ]),
  ]
}

example

vue-cli示例工程