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@llius/uniapp-inject-loader

v0.0.4

Published

一个uniapp在通过webpack打包APP/小程序时注入全局组件的loader

Downloads

1

Readme

uniapp-inject-loader

介绍

即使我们可以使用uniapp的 easycom 配置来实现全局组件的引入,但是在APP、小程序中,由于没有根标签,我们仍然需要在每个vue文件的 template 中进行修改来引入组件,这样就会导致每个文件都要修改编写一遍同样的代码,代码冗余,不利于维护,所以我们需要一个插件来实现全局组件的注入,这样就可以自动将我们所需的组件注入到所有页面,而不需要在每个文件中手动修改了。

安装

npm i @llius/uniapp-inject-loader -D

vue.config.js 注入loader

/* vue.config.js file */
const path = require('path')
module.exports = {
  configureWebpack: {
    module: {
      rules: [
        {
          test: /\.vue$/,
          use: {
            loader: path.resolve(__dirname, '../node_modules/@llius/uniapp-inject-loader/src/index.js'),
            options: {
              // 根据自己项目需要启用配置的平台进行填写,比如 ['app-plus','mp-weixin']
              VUE_APP_PLATFORMS: ['app-plus']
            }
          }
        }
      ]
    }
  }
}
// 支持自定义pages.json文件路径
options: {
  pagesPath: path.resolve(__dirname,'./src/pages.json')
}

第三步 pages.json配置文件中添加 injectLoader

配置前,先要了解 pages.jsoneasycom配置 & easycom规范

  • 我们需要在全局的 components 目录下创建一个全局组件,比如名字叫 custom-global-component,然后就可以在任意页面去使用<custom-global-component />组件标签来插入该组件了

使用该 leader 可以省去在每个页面引入组件的步骤,直接在 pages.json 中配置即可,支持全局配置和单独页面配置,不需要对原有业务代码有侵入型

/* pages.json file */
"injectLoader": {
  /* 同一全局组件 injectLabel or injectCode 二选一 */
  "injectLabel": ["custom-global-component"], // 以标签的形式插入代码
  "injectCode": ["custom-global-component"], // 以代码的形式插入代码
  "rootEle": "view"
},
"pages": [
  {
    "path": "pages/test/index",
    "style": {
      "navigationBarTitleText": "测试页面",
      // 单独配置,用法跟全局配置一致,优先级高于全局
      "injectCode": ["custom-global-component"], // 注入代码
      "injectLabel": ["custom-global-component"], // 注入标签
      "rootEle":"div"
    }
  }
]

配置说明

  • injectCode(default: []) 需要全局引入的代码,打包后会在所有页面注入该组件的所有代码
  • injectLabel(default: []) 需要全局引入的标签,打包后会在所有页面引入以此命子为名的html标签
  • rootEle(default: "view") 根元素的标签类型,缺省值为div,支持正则,比如匹配任意标签 ".*"

injectCodeinjectLabelrootEle 支持在单独页面的style里配置,优先级高于全局配置

两种注入方式的区别

  • injectLabel
    • injectLabel 会将组件的 <custom-global-component /> 代码注入到页面的 template 中,从而实现全局组件的引入
    • 优点:组件跟页面的代码是分离的,不会导致页面、组件的代码产生冲突
    • 缺点:组件无法使用页面的数据,因为注入的代码无法传入参数
  • injectCode
    • injectCode 会将 custom-global-component 组件的所有代码部分(templatescriptstyle)注入合并到页面中,从而实现全局组件的引入
    • 优点:组件可以使用页面的数据,因为注入的代码与页面共享同一个 script 代码块
    • 缺点:组件跟页面的代码是在同一个 script 中,可能会导致代码冲突;样式冲突等

tips

  • 优先推荐使用 injectLabel 配置,因为这种方式不会导致代码冲突,对原有业务代码的侵入性最小
  • 如果使用 injectCode 配置,建议仅使用简易便于维护的组件,过于复杂的生命周期、数据处理、函数等注入到页面后可能会导致代码冲突,不利于维护