Vue项目分包打包配置（包含dev)全过程

今天领导要求支援某项目的分包配置，emmm，在参考了公司其他项目的分包操作后，依葫芦画瓢，中间也踩了好几个坑，简单记录下过程。

一、拉代码、安装依赖

哈哈哈，上来就踩坑了，我拉了代码后，直接哐哐整，然后一堆依赖报错，我才发现，同事新增了依赖包，我并不知道，然后就乖乖安装依赖吧。此处要特别强调一下，***没有cross-env 这个依赖的，记得要安装一下，没有cross-env 这个依赖的，记得要安装一下，没有cross-env 这个依赖的，记得要安装一下，***重要的事情说三遍，不安的话分包整不了。shell命令贴上了：npm install --save-dev cross-env 安装成功后 package.json里面会多"cross-env": “^7.0.3”,配置项，那就对了.如果实在不行，要不然你就试试全局安装吧，npm install -g cross-env，反正全局安装肯定是可以的，

二、配置环境变量

这个也是个坑坑啊，我要改的项目没有配置环境变量，我一开始没发现，后来死活不加载不同环境下对应的路由，才发现是这的坑。还有打包目录名字可配可不配，不过建议配置上。

vue.config.js中如下配置

 let projectName = process.env.PROJECT_NAME || "All";  //获取名称
module.exports = {
  publicPath: './',
  outputDir: "dist/" + projectName + "/", //打包后的项目目录名称，建议这样修改
  productionSourceMap: false,
  lintOnSave: false,
  devServer: {
     //自己公司项目自己配置哈
  },
  chainWebpack: config => {
    // 设置环境变量
    config.plugin("define").tap(args => {
      args[0]["process.env"].PROJECT_NAME = JSON.stringify(
        process.env.PROJECT_NAME
      );
      return args;
    });
  }
}

三、拆路由

把项目中router.js中的要分包的路由分别拆到不同的文件中，例如我图中就拆了前后9个，后续不同的打包命令，就会加载这九个文件中的对应的路由。此处有个疑问，就是能不能拆分子路由的问题，大家可以试试。我是把一个模块的父子路由打包带走的。此处就放两个文件路由大家参考一下

//sign.js
export default[
  {
    path: "/main",
    name: "main",
    meta: { cachePage: true },
    component: () => import("@/views/main/main.vue"),
    children: [
      {
        path: "/other",
        name: "other",
        component: () => import("@/views/login/other"),
      },
      /* 贷款签约 */
      {
        path: "/loanSigning",
        name: "loanSigning",
        meta: { cachePage: true, showMain: true },
        component: () => import("@/views/loanSigning/index"),
      },
      {
        path: "/loanSigningEdit",
        name: "loanSigningEdit",
        meta: { showBack: true },
        component: () => import("@/views/loanSigning/loanSigningEdit"),
      },
      {
        path: "/loanSigningRead",
        name: "loanSigningRead",
        meta: { showBack: true },
        component: () => import("@/views/loanSigning/loanSigningRead"),
      },  
    ]
    }
]
```javascript
```javascript
//track.js
export default[
  {
    path: "/main",
    name: "main",
    meta: { cachePage: true },
    component: () => import("@/views/main/main.vue"),
    children: [
      {
        path: "/other",
        name: "other",
        component: () => import("@/views/login/other"),
      },
      /* 轨迹视图 */
      {
        path: "/trackView",
        name: "mobileMarketing",
        meta: { cachePage: true, showMain: true },
        component: () => import("@/views/trackView/index"),
      },
      {
        path: "/trackViewAdd",
        name: "trackViewAdd",
        meta: { showBack: true },
        component: () => import("@/views/trackView/trackViewAdd"),
      }, 
    ]
    }
]

四、配置config.js文件

config.js主要是判断不同的环境下，加载刚才拆的那九个不同的路由

//config.js
let options={
    "routersName":[],//路由文件名列表
    "menuFlag":"",//显示的功能列表标识
}
if(process.env.PROJECT_NAME=='All'){
    options.menuFlag="All"
    options.routersName=[
        ...require("@/plugins/vueRouter/all.js").default
    ]
}else if(process.env.PROJECT_NAME=='potential'){
    options.menuFlag="potential"
    options.routersName=[
        ...require("@/plugins/vueRouter/potential.js").default,
    ]   
}else if(process.env.PROJECT_NAME=='mobile'){  
    options.menuFlag="mobile"
    options.routersName=[
        ...require("@/plugins/vueRouter/mobile.js").default,
    ]   
}else if(process.env.PROJECT_NAME == 'credit'){
    options.menuFlag="credit"
    options.routersName=[
        ...require("@/plugins/vueRouter/credit.js").default,
    ]   
}else if(process.env.PROJECT_NAME == 'loan'){
    options.menuFlag="loan"
    options.routersName=[
        ...require("@/plugins/vueRouter/loan.js").default,
    ]   
}else if(process.env.PROJECT_NAME == 'sign'){
    options.menuFlag="sign"
    options.routersName=[
        ...require("@/plugins/vueRouter/sign.js").default,
    ]   
}else if(process.env.PROJECT_NAME == 'track'){
    options.menuFlag="track"
    options.routersName=[
        ...require("@/plugins/vueRouter/track.js").default,
    ] 
}else if(process.env.PROJECT_NAME == 'approval'){
    options.menuFlag="approval"
    options.routersName=[
        ...require("@/plugins/vueRouter/approval.js").default,
    ] 
}else if(process.env.PROJECT_NAME == 'main'){
    options.menuFlag="main"
    options.routersName=[
        ...require("@/plugins/vueRouter/main.js").default,
    ] 
}
export default options

五、修改router.js

//router.js
import Vue from "vue";
import VueRouter from "vue-router";
import store from "@/plugins/vuex/store";
import config from "../../config"   //这个路径要以你的项目路径来哈，自行修改
Vue.use(VueRouter);
let routes=[
  { path: "/", name: "index", redirect: "/login" },
  {
    path: "/login",
    name: "login",
    meta: { cachePage: true },
    component: () => import("@/views/login/login.vue"),
  }
  //要拆包的那些路径，都要删了哈，不然分包就分个寂寞啦！！！！！！！！
  ]
routes=[...routes,...config.routersName] //路由表合并
console.log(routes,'routerjs中本身的路由')
console.log(config,'config中获取的路由')
console.log(process.env.PROJECT_NAME,'环境变量')
const router = new VueRouter({
  // mode: 'hash',
  base: process.env.BASE_URL,
  routes
});
//如果你的项目中有其他的逻辑  再自行添加哈
// ...........其他业务逻辑代码

在合并路由表那块 ，我本来想试试子路由单独拿出来，父路由还放在router.js中的，但是我感觉往children里面塞，也不够优雅，就索性把 path: "/main"这个父路由和children里的子路由都拆走了

六、配置package.json

终于到了这一步，临门一脚了，这一步就是配置shell命令了

为了方便复制，我把package.json里scripts里面的命令代码给大家贴出来，其他的配置应该不用我贴了吧

//package.json中的命令
 "scripts": {
    "dev": "set NODE_OPTIONS=--openssl-legacy-provider && cross-env PROJECT_NAME=All vue-cli-service serve",
    "dev:main": "cross-env PROJECT_NAME=main vue-cli-service serve",
    "dev:potential": "cross-env PROJECT_NAME=potential vue-cli-service serve",
    "dev:mobile": "cross-env PROJECT_NAME=mobile vue-cli-service serve",
    "dev:credit": "cross-env PROJECT_NAME=credit vue-cli-service serve",
    "dev:loan": "cross-env PROJECT_NAME=loan vue-cli-service serve",
    "dev:sign": "cross-env PROJECT_NAME=sign vue-cli-service serve",
    "dev:track": "cross-env PROJECT_NAME=track vue-cli-service serve",
    "dev:approval": "cross-env PROJECT_NAME=approval vue-cli-service serve",
    "build": "cross-env PROJECT_NAME=All vue-cli-service build",
    "build:potential": "cross-env PROJECT_NAME=potential vue-cli-service build",
    "build:main": "cross-env PROJECT_NAME=main vue-cli-service build",
    "build:mobile": "cross-env PROJECT_NAME=mobile vue-cli-service build",
    "build:credit": "cross-env PROJECT_NAME=credit vue-cli-service build",
    "build:loan": "cross-env PROJECT_NAME=loan vue-cli-service build",
    "build:sign": "cross-env PROJECT_NAME=sign vue-cli-service build",
    "build:track": "cross-env PROJECT_NAME=track vue-cli-service build",
    "build:approval": "cross-env PROJECT_NAME=approval vue-cli-service build",
    "lint": "vue-cli-service lint"
  },

好了，运行不同的命令试试吧。我反反复复有些莫名的报错，重装cross-env也反复好几次，全局的，局部都试过。再比如 dev 不行，dev：main就可以，我就删除了node-modules，重新下载了依赖，就可以了。 呼~~~~ 终于搞定了，希望大家能少走一些坑，拜拜~~~