AngularJs 動態加載模塊和依賴

時間 2019-11-13

原文原文鏈接

最近項目比較忙額，白天要上班，晚上回來還須要作Angular知識點的ppt給同事，畢竟年末要辭職了，項目的後續開發仍是須要有人接手的，因此就佔用了晚上學習的時間。原本一直不打算寫這些第三方插件的學習筆記，不過以爲按需加載模塊而且成功使用這個確實是個好處，仍是記錄下來吧。基於本獸沒怎麼深刻的使用requireJs，因此本獸不知道這個和requireJs有什麼區別，也不能清晰的說明這到底算不算Angular的按需加載。css

爲了實現這篇學習筆記知識點的效果，咱們須要用到：html

angular:https://github.com/angular/angular.jsnode

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

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

廢話很少說，進入正題...json

首先咱們看下文件結構：bootstrap

Angular-ocLazyLoad                      --- demo文件夾
    Scripts                             --- 框架及插件文件夾
        angular-1.4.7                   --- angular 不解釋
        angular-ui-router               --- uirouter 不解釋
        oclazyload                      --- ocLazyload 不解釋
        bootstrap                       --- bootstrap 不解釋
        angular-tree-control-master     --- angular-tree-control-master 不解釋
        ng-table                        --- ng-table 不解釋
        angular-bootstrap               --- angular-bootstrap 不解釋
    js                                  --- js文件夾 針對demo寫的js文件
        controllers                     --- 頁面控制器文件夾
            angular-tree-control.js     --- angular-tree-control控制器代碼
            default.js                  --- default控制器代碼
            ng-table.js                 --- ng-table控制器代碼
        app.config.js                   --- 模塊註冊及配置代碼
        oclazyload.config.js            --- 加載模塊配置代碼
        route.config.js                 --- 路由配置及加載代碼
    views                               --- html頁面文件夾
        angular-tree-control.html       --- angular-tree-control插件的效果頁面
        default.html                    --- default頁面
        ng-table.html                   --- ng-table插件效果頁面
        ui-bootstrap.html               --- uibootstrap插件效果頁面
    index.html                          --- 主頁面

注意：這個demo沒作嵌套路由，只是簡單實現單視圖的路由以展現效果。app

咱們來看主頁面的代碼：框架

<!DOCTYPE html>
<html lang="en" 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>
<div ng-app="templateApp">
    <div>
        <a href="#/default">主頁</a>
        <a href="#/uibootstrap" >ui-bootstrap</a>
        <a href="#/ngtable">ng-table</a>
        <a href="#/ngtree">angular-tree-control</a>
    </div>
    <div ui-view></div>
</div>
</body>
</html>

在這個頁面，咱們只加載了bootstrap的css、angular的js、ui-router的js、ocLazyLoad的js，以及3個配置的js文件。ide

再看看四個頁面的html代碼：

angular-tree-control效果頁面

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

頁面上有個使用該插件對應的指令。

default頁面

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

這裏咱們只是用來證實加載並正確執行default.js。

ng-table效果頁面

<div class="ng-cloak">
    <div class="p-h-md p-v bg-white box-shadow pos-rlt">
        <h3 class="no-margin">ng-table</h3>
    </div>
    <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="'Name'" sortable="'name'">
                {{user.name}}
            </td>
            <td data-title="'Age'" sortable="'age'">
                {{user.age}}
            </td>
        </tr>
    </table>
</div>

這裏寫了些簡單的ng-table效果。

ui-bootstrap效果頁面

<span uib-dropdown class="ng-cloak">
      <a href id="simple-dropdown" uib-dropdown-toggle>
          下拉框觸發
      </a>
      <ul class="uib-dropdown-menu dropdown-menu" aria-labelledby="simple-dropdown">
          下拉框內容.這裏寫個效果證實實現動態加載便可
      </ul>
  </span>

這裏僅寫了個下拉框效果，證實正確加載並使用該插件。

好了，看完了html，咱們看下加載配置和路由配置：

"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;
                }]);

以上代碼對模塊的註冊，僅僅依賴了ui.router和oc.LazyLoad。配置也只是簡單配置了模塊，以便在後面的js能識別到tempApp上的方法。

而後咱們再看看ocLazyLoad加載模塊的配置：

"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
    });
};

路由的配置：

"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");
                    }
                );
            }]
        } 
    })
};

ui-bootstrap的下拉框簡單的實現不須要控制器，那麼咱們就只看看ng-table和angular-tree-control的控制器js吧：

ng-table.js

(function(){
"use strict"
tempApp
.controller("ngTableCtrl",["$location","NgTableParams","$filter",ngTableCtrlFn]);
function ngTableCtrlFn($location,NgTableParams,$filter){
    //數據
    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(    // 合併默認的配置和url參數
        angular.extend({
            page: 1,            // 第一頁
            count: 10,          // 每頁的數據量
            sorting: {
                name: 'asc'     // 默認排序
            }
        },
        $location.search())
        ,{
            total: data.length, // 數據總數
            getData: function ($defer, params) {
                $location.search(params.url()); // 將參數放到url上，實現刷新頁面不會跳回第一頁和默認配置
                var orderedData = params.sorting ?
                        $filter('orderBy')(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(){
    //樹數據
    this.treeData = [
                {
                    id:"1",
                    title:"標籤1",
                    childList:[
                        {
                            id:"1-1",
                            title:"子級1",
                            childList:[
                                {
                                    id:"1-1-1",
                                    title:"再子級1",
                                    childList:[]
                                }
                            ]
                        },
                        {
                            id:"1-2",
                            title:"子級2",
                            childList:[
                                {
                                    id:"1-2-1",
                                    title:"再子級2",
                                    childList:[
                                        {
                                            id:"1-2-1-1",
                                            title:"再再子級1",
                                            childList:[]
                                        }
                                    ]
                                }
                            ]
                        },
                        {
                            id:"1-3",
                            title:"子級3",
                            childList:[]
                        }
                    ]
                },
                {
                    id:"2",
                    title:"標籤2",
                    childList:[
                        {
                            id:"2-1",
                            title:"子級1",
                            childList:[]
                        },
                        {
                            id:"2-2",
                            title:"子級2",
                            childList:[]
                        },
                        {
                            id:"2-3",
                            title:"子級3",
                            childList:[]
                        }
                    ]}
                ,
                {
                    id:"3",
                    title:"標籤3",
                    childList:[
                        {
                            id:"3-1",
                            title:"子級1",
                            childList:[]
                        },
                        {
                            id:"3-2",
                            title:"子級2",
                            childList:[]
                        },
                        {
                            id:"3-3",
                            title:"子級3",
                            childList:[]
                        }
                    ]
                }
            ];
    //樹配置
    this.treeOptions = {
        nodeChildren:"childList",
        dirSelectable:false
    };
};
})();