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AngularJs dynamically loads modules and dependencies

高洛峰

Mar 25, 2017 pm 04:11 PM

I have been very busy with projects recently. I have to go to work during the day, and when I come back in the evening, I need to make a ppt of Angular knowledge points for my colleagues. After all, I am resigning at the end of the year, and someone still needs to take over the follow-up development of the project, so it takes up the time to study in the evening. . Originally I had not planned to write study notes on these third-party plug-ins, but I think it is indeed a benefit to load modules on demand and use them successfully, so I might as well record them. Since I haven’t used requireJs very deeply, I don’t know the difference between this and requireJs, and I can’t clearly explain whether this is Angular’s on-demand loading.

In order to achieve the effect of the knowledge points of this study note, we need to use:

angular:https://github.com/angular/angular.js

ui -router:https://github.com/angular-ui/ui-router

ocLazyLoad:https://github.com/ocombe/ocLazyLoad

Without further ado, let’s get to the point ...

First let’s take a look at the file structure:

Angular-ocLazyLoad           --- demo文件夹
  Scripts               --- 框架及插件文件夹
    angular-1.4.7          --- angular 不解释
    angular-ui-router        --- uirouter 不解释
    oclazyload           --- ocLazyload 不解释
    bootstrap            --- bootstrap 不解释
    angular-tree-control-master   --- angular-tree-control-master 不解释
    ng-table            --- ng-table 不解释
    angular-bootstrap        --- angular-bootstrap 不解释
  js                 --- js文件夹 针对demo写的js文件
    controllers           --- 页面控制器文件夹
      angular-tree-control.js   --- angular-tree-control控制器代码
      default.js         --- default控制器代码
      ng-table.js         --- ng-table控制器代码
    app.config.js          --- 模块注册及配置代码
    oclazyload.config.js      --- 加载模块配置代码
    route.config.js         --- 路由配置及加载代码
  views                --- html页面文件夹
    angular-tree-control.html    --- angular-tree-control插件的效果页面
    default.html          --- default页面
    ng-table.html          --- ng-table插件效果页面
    ui-bootstrap.html        --- uibootstrap插件效果页面
  index.html             --- 主页面

Note: This demo does not do nested routing, but simply implements single-view routing to show the effect.

Let’s look at the code of the main page:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <meta charset="utf-8" />
  <title></title>
  <link rel="stylesheet" href="Scripts/bootstrap/dist/css/bootstrap.min.css" />
  <script src="Scripts/angular-1.4.7/angular.js"></script>
  <script src="Scripts/angular-ui-router/release/angular-ui-router.min.js"></script>
  <script src="Scripts/oclazyload/dist/ocLazyLoad.min.js"></script>
  <script src="js/app.config.js"></script>
  <script src="js/oclazyload.config.js"></script>
  <script src="js/route.config.js"></script>
</head>
<body>
<p ng-app="templateApp">
  <p>
    <a href="#/default">主页</a>
    <a href="#/uibootstrap" >ui-bootstrap</a>
    <a href="#/ngtable">ng-table</a>
    <a href="#/ngtree">angular-tree-control</a>
  </p>
  <p ui-view></p>
</p>
</body>
</html>

On this page, we only loaded bootstrap’s css, angular’s js, ui-router’s js, ocLazyLoad’s js, and 3 Configured js file.

Look at the html code of the four pages:

angular-tree-control effect page

<treecontrol tree-model="ngtree.treeData" class="tree-classic ng-cloak" options="ngtree.treeOptions">
   {{node.title}}
 </treecontrol>

There is an instruction corresponding to using the plug-in on the page.

default page

<p class="ng-cloak">
   {{default.value}}
 </p>

Here we just use it to prove that default.js is loaded and executed correctly.

ng-table effect page

<p class="ng-cloak">
  <p class="p-h-md p-v bg-white box-shadow pos-rlt">
    <h3 id="ng-table">ng-table</h3>
  </p>
  <button ng-click="ngtable.tableParams.sorting({})" class="btn btn-default pull-right">Clear sorting</button>
  <p>
    <strong>Sorting:</strong> {{ngtable.tableParams.sorting()|json}}
  </p>
  <table ng-table="ngtable.tableParams" class="table table-bordered table-striped">
    <tr ng-repeat="user in $data">
      <td data-title="&#39;Name&#39;" sortable="&#39;name&#39;">
        {{user.name}}
      </td>
      <td data-title="&#39;Age&#39;" sortable="&#39;age&#39;">
        {{user.age}}
      </td>
    </tr>
  </table>
</p>

Here are some simple ng-table effects.

ui-bootstrap effect page

<span uib-dropdown class="ng-cloak">
   <a href id="simple-dropdown" uib-dropdown-toggle>
     下拉框触发
   </a>
   <ul class="uib-dropdown-menu dropdown-menu" aria-labelledby="simple-dropdown">
     下拉框内容.这里写个效果证明实现动态加载即可
   </ul>
 </span>

Only a drop-down box effect is written here to prove that the plug-in is loaded and used correctly.

Okay, after reading the html, let’s take a look at the loading configuration and routing configuration:

"use strict"
var tempApp = angular.module("templateApp",["ui.router","oc.lazyLoad"])
.config(["$provide","$compileProvider","$controllerProvider","$filterProvider",
        function($provide,$compileProvider,$controllerProvider,$filterProvider){
          tempApp.controller = $controllerProvider.register;
          tempApp.directive = $compileProvider.directive;
          tempApp.filter = $filterProvider.register;
          tempApp.factory = $provide.factory;
          tempApp.service =$provide.service;
          tempApp.constant = $provide.constant;
        }]);

The above code only relies on ui.router and oc.LazyLoad to register the module. The configuration is just a simple configuration of the module so that the subsequent js can recognize the methods on tempApp.

Then let’s look at the configuration of the ocLazyLoad loading module:

"use strict"
tempApp
.constant("Modules_Config",[
  {
    name:"ngTable",
    module:true,
    files:[
      "Scripts/ng-table/dist/ng-table.min.css",
      "Scripts/ng-table/dist/ng-table.min.js"
    ]
  },
  {
    name:"ui.bootstrap",
    module:true,
    files:[
      "Scripts/angular-bootstrap/ui-bootstrap-tpls-0.14.3.min.js"
    ]
  },
  {
    name:"treeControl",
    module:true,
    files:[
      "Scripts/angular-tree-control-master/css/tree-control.css",
      "Scripts/angular-tree-control-master/css/tree-control-attribute.css",
      "Scripts/angular-tree-control-master/angular-tree-control.js"
    ]
  }
])
.config(["$ocLazyLoadProvider","Modules_Config",routeFn]);
function routeFn($ocLazyLoadProvider,Modules_Config){
  $ocLazyLoadProvider.config({
    debug:false,
    events:false,
    modules:Modules_Config
  });
};

Routing configuration:

"use strict"
tempApp.config(["$stateProvider","$urlRouterProvider",routeFn]);
function routeFn($stateProvider,$urlRouterProvider){
  $urlRouterProvider.otherwise("/default");
  $stateProvider
  .state("default",{
    url:"/default",
    templateUrl:"views/default.html",
    controller:"defaultCtrl",
    controllerAs:"default",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("js/controllers/default.js");
      }]
    } 
  })
  .state("uibootstrap",{
    url:"/uibootstrap",
    templateUrl:"views/ui-bootstrap.html",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("ui.bootstrap");
      }]
    } 
  })
  .state("ngtable",{
    url:"/ngtable",
    templateUrl:"views/ng-table.html",
    controller:"ngTableCtrl",
    controllerAs:"ngtable",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("ngTable").then(
          function(){
            return $ocLazyLoad.load("js/controllers/ng-table.js");
          }
        );
      }]
    } 
  })
  .state("ngtree",{
    url:"/ngtree",
    templateUrl:"views/angular-tree-control.html",
    controller:"ngTreeCtrl",
    controllerAs:"ngtree",
    resolve:{
      deps:["$ocLazyLoad",function($ocLazyLoad){
        return $ocLazyLoad.load("treeControl").then(
          function(){
            return $ocLazyLoad.load("js/controllers/angular-tree-control.js");
          }
        );
      }]
    } 
  })
};

The simple implementation of the ui-bootstrap drop-down box does not require a controller, then Let’s just look at the controller js of ng-table and angular-tree-control:

ng-table.js

(function(){
"use strict"
tempApp
.controller("ngTableCtrl",["$location","NgTableParams","$filter",ngTableCtrlFn]);
function ngTableCtrlFn($location,NgTableParams,$filter){
  //数据
  var data = [{ name: "Moroni", age: 50 },
         { name: "Tiancum ", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 },
         { name: "Tiancum", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 },
         { name: "Tiancum", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 },
         { name: "Tiancum", age: 43 },
         { name: "Jacob", age: 27 },
         { name: "Nephi", age: 29 },
         { name: "Enos", age: 34 }];
  this.tableParams = new NgTableParams(  // 合并默认的配置和url参数
    angular.extend({
      page: 1,      // 第一页
      count: 10,     // 每页的数据量
      sorting: {
        name: &#39;asc&#39;   // 默认排序
      }
    },
    $location.search())
    ,{
      total: data.length, // 数据总数
      getData: function ($defer, params) {
        $location.search(params.url()); // 将参数放到url上，实现刷新页面不会跳回第一页和默认配置
        var orderedData = params.sorting ?
            $filter(&#39;orderBy&#39;)(data, params.orderBy()) :data;
        $defer.resolve(orderedData.slice((params.page() - 1) * params.count(), params.page() * params.count()));
      }
    }
  );
};
})();

angular-tree-control.js

(function(){
"use strict"
tempApp
.controller("ngTreeCtrl",ngTreeCtrlFn);
function ngTreeCtrlFn(){
  //树数据
  this.treeData = [
        {
          id:"1",
          title:"标签1",
          childList:[
            {
              id:"1-1",
              title:"子级1",
              childList:[
                {
                  id:"1-1-1",
                  title:"再子级1",
                  childList:[]
                }
              ]
            },
            {
              id:"1-2",
              title:"子级2",
              childList:[
                {
                  id:"1-2-1",
                  title:"再子级2",
                  childList:[
                    {
                      id:"1-2-1-1",
                      title:"再再子级1",
                      childList:[]
                    }
                  ]
                }
              ]
            },
            {
              id:"1-3",
              title:"子级3",
              childList:[]
            }
          ]
        },
        {
          id:"2",
          title:"标签2",
          childList:[
            {
              id:"2-1",
              title:"子级1",
              childList:[]
            },
            {
              id:"2-2",
              title:"子级2",
              childList:[]
            },
            {
              id:"2-3",
              title:"子级3",
              childList:[]
            }
          ]}
        ,
        {
          id:"3",
          title:"标签3",
          childList:[
            {
              id:"3-1",
              title:"子级1",
              childList:[]
            },
            {
              id:"3-2",
              title:"子级2",
              childList:[]
            },
            {
              id:"3-3",
              title:"子级3",
              childList:[]
            }
          ]
        }
      ];
  //树配置
  this.treeOptions = {
    nodeChildren:"childList",
    dirSelectable:false
  };
};
})();

Let us ignore default.js, after all there is only "Hello Wrold" in it.

For more articles related to AngularJs dynamic loading modules and dependencies, please pay attention to the PHP Chinese website!

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