Angular UI-Router failing to show nested view on page

I've integrated UI-Router into my application but I'm encountering an issue with a nested route. Here's how my index.html page is structured;

<body>
    <!-- Navigation code -->

    <!-- Content from the template -->
    <div ui-view></div>

    <!-- Footer -->

    <!-- Application Scripts -->
</body>

This is the Angular ui-route code I have implemented;

(function () {
    'use strict';

    var app = angular.module('rbApp', ['ngAnimate', 'ui.router', 'ui.bootstrap']);

    app.config(["$stateProvider", "$urlRouterProvider", function ($stateProvider, $urlRouterProvider) {
        $urlRouterProvider.otherwise("/");

        $stateProvider
        .state("home", {
            url: "/",
            templateUrl: "/App/WebSite/home.html",
            controller: "homeController as homeVm"
        })
        .state("programs", {
            url: "/programs",
            templateUrl: "/App/WebSite/programs.html",
            controller: "programsController as programVm"
        })
        .state("programs.complete", {
            url: "/complete",
            templateUrl: "/App/WebSite/programsComplete.html"
        })
        .state("articles", {
            url: "/articles",
            templateUrl: "/App/WebSite/articles.html",
            controller: "articleController as articleVm"
        })
    }]);

    app.run(['$rootScope', function ($rootScope) {
        $rootScope.$on('$locationChangeStart', function (event, newUrl, oldUrl) {
            console.log('Location change: %s --> %s', oldUrl, newUrl);
        });
    }]);

})();

Upon selecting the "programs" route, the page is rendered correctly and the "app.run" code above logs to the console;

Location change: http://localhost:50321/#/ --> http://localhost:50321/#/programs

Within the programs page, there is an image embedded in an anchor tag like this;

    <div class="col-md-3 hidden-sm hidden-xs">
        <a ui-sref="programs.complete"><img class="img-thumbnail img-responsive" src="/Images/Programs/Program01Small.jpg" /></a>
    </div>

However, clicking on the image triggers the following console log;

Location change: http://localhost:50321/#/programs --> http://localhost:50321/#/programs/complete

While the routing seems to be functioning correctly, the "programsComplete.html" template fails to display, instead, the browser continues to show the "programs.html" template.

After checking the console log for errors, none are found. Also, the "programsComplete.html" currently only contains a <h1> tag and text confirming that the template is indeed being loaded.

If anyone can offer insights into why the template might not be loading, I would greatly appreciate it.

Answer №1

It appears that the main template programs.html is currently missing from its child template. Make sure that the programs.html includes an unnamed view target.

<div ui-view="">

Each child template is inserted into its parent template. If we want the child to replace the parent, we must use the absolute name, like targeting the index.html in this example:

.state("programs.complete", {
    url: "/complete",
    views : {
      '@' : {
        templateUrl: "/App/WebSite/programsComplete.html"
       }
    }
})

Although the naming convention views : { '@' : ... may seem strange, it simply refers to the absolute name:

View Names - Relative vs. Absolute Names

Behind the scenes, every view is given an absolute name following a scheme of viewname@statename, with viewname being the directive name and statename as the state's absolute name (e.g., contact.item). You can also opt for writing your view names with the absolute syntax.

Therefore, '@' indicates an unnamed view within the unnamed state, which is equivalent to the root state.

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