javascriptangularjsstatesession-state-provider

Angular-js Include js on each state

Hi I have created an angular application and I have created separate controller for each I want to load each controller when the corresponding state has been reached

I don't to want to load all controller at my index.html

My index.html

 <!-- UI Elements-->
        <link rel="stylesheet" type="text/css" href="common/resources/UI/css/bootstrap.css">
        <script src="common/resources/UI/js/bootstrap.js"></script>
    <!-- UI Elements-->

    <!--Angular Elements-->

        <!--Angular js file from google-->
            <script src="common/resources/Angular/Angular/angular.js"></script>
            <script src="common/resources/Angular/Angular/angular-route.js"></script>
            <script src="common/resources/Angular/Angular/angular-ui-router.js"></script>
            <script src="common/resources/Angular/Angular/angular-router-styles.js"></script>
        <!--Angular js file from google-->

        <!--Angular Modules-->
            <script src="common/resources/Angular/Module/module.js"></script>
        <!--Angular Modules-->

        <!--Angular Route Config-->
            <script src="common/resources/Angular/Module/Configuration/rootConfig.js"></script>
        <!--Angular Route Config-->

        <!--Angular Controller-->
            <script src="common/resources/Angular/Controller/ControllerImpl/mainControllerImpl.js"></script>
            <script src="common/resources/Angular/Controller/controllers.js"></script>
        <!--Angular Controller-->

My RootStatefile I want to load login.js and use controller loginController when state chnages to /login 

 /*
        Summary        :  Login Page
        Description    :  Used to show the login page of application
        Author         :  Nithin Prasad
    */
        .state('/login', {
            url: '/', 
            controller: 'loginController',
            templateUrl: 'module/login/login.html',
            data: {
                css: [
                        {
                            href: 'module/login/css/login.css'
                        }
                     ],
                 scripts: [
                        {
                                href: 'module/login/js/login.js'
                        }
                     ]
                  }
        })

I don't want to write all controller implementation in one file and i want it to modularized

Please help my login.js

var loginController = function ($scope, $log) {
    $scope.userName = "nithinprasad59@yahoo.com";
    $scope.password = "nithin123";
    $scope.userEmail = $scope.userName;
}

smartExpenseApp.controller('loginController', loginController);

my login.html has a reference to loginController

<div class="container" ng-controller="loginController">
    <div class="row">
        <div class="col-md-6 col-md-offset-3">
            <div class="jumbotron">
                <h1>Login</h1>
                <form class="form-horizontal" name="loginForm">
                    <div class="form-group">
                        <label for="inputEmail3" class="col-sm-2 control-label">Email</label>
                        <div class="col-sm-10">
                            <input type="email" class="form-control" required id="inputEmail3" placeholder="Email" name="email" ng-model="userEmail">
                        </div>
                    </div>
                    <div ng-show="loginForm.email.$dirty && loginForm.email.$invalid" class="alert alert-danger" role="alert">
                        <span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true"></span>
                        <span ng-show="loginForm.email.$error.required">Email is required.</span>
                        <span ng-show="loginForm.email.$error.email">Invalid email address.</span>
                    </div>
                    <div class="form-group">
                        <label for="inputPassword3" class="col-sm-2 control-label">Password</label>
                        <div class="col-sm-10">
                            <input type="password" required name="password" class="form-control" id="inputPassword3" placeholder="Password" ng-model="password">
                        </div>
                    </div>
                     <div ng-show="loginForm.password.$dirty && loginForm.password.$invalid" class="alert alert-danger" role="alert">
                        <span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true"></span>
                        <span ng-show="loginForm.password.$error.required">Password is required.</span>
                    </div>
                    <div class="form-group">
                        <div class="col-sm-offset-2 col-sm-10">
                            <button type="submit" class="btn btn-primary">Sign in</button>
                        </div>
                    </div>

                    Hello ! {{userEmail}} Your password is {{password}}
            </div>
        </div>

        </form>
        
    </div>
</div>

</div>

but i am getting following error LoginControler not found

Solution

  • You want to load the files only when its needed. Such type of loading is called lazy loading. You can add only the primary js and css files in the html and can load the template html and other js files later on when needed.

    You can use oclazyload for this.

    first do install the dependancy file using bower or npm.

    bower install oclazyload or npm install oclazyload

    then you need to add the module to your application

    var smartExpenseApp = angular.module("smartExpenseApp", ["oc.lazyLoad"]);

    You are done with that. now inject the dependancy in your controller file that you are added in the index.html.

    smartExpenseApp.controller("MyCtrl",['$ocLazyLoad', function($ocLazyLoad) { //do something here //now you need your login controller $ocLazyLoad.load('login.js'); }]);

    You can load a file inside a function, switch cases etc.

    for more details refer https://oclazyload.readme.io/docs