user1 user1 - 3 months ago 34
AngularJS Question

Set Page title using UI-Router

I am migrating my AngularJS based app to use ui-router instead of the built in routing. I have it configured as shown below

.config(function($stateProvider, $urlRouterProvider) {
$urlRouterProvider.otherwise('/home');
$stateProvider
.state('home', {
url: '/home',
templateUrl : 'views/home.html',
data : { pageTitle: 'Home' }

})
.state('about', {
url: '/about',
templateUrl : 'views/about.html',
data : { pageTitle: 'About' }
})
});


How can I use the pageTitle variable to dynamically set the title of the page? Using the built in routing, I could do

$rootScope.$on("$routeChangeSuccess", function(currentRoute, previousRoute){
$rootScope.pageTitle = $route.current.data.pageTitle;
});


and then bind the variable in HTML as shown below

<title ng-bind="$root.pageTitle"></title>


Is there a similar event that I can hook into using ui-router? I noticed that there are 'onEnter' and 'onExit' functions but they seem to be tied to each state and will require me to repeat code to set the $rootScope variable for each state.

Answer

Use $stateChangeSuccess.

You can put it in a directive:

app.directive('updateTitle', ['$rootScope', '$timeout',
  function($rootScope, $timeout) {
    return {
      link: function(scope, element) {

        var listener = function(event, toState) {

          var title = 'Default Title';
          if (toState.data && toState.data.pageTitle) title = toState.data.pageTitle;

          $timeout(function() {
            element.text(title);
          }, 0, false);
        };

        $rootScope.$on('$stateChangeSuccess', listener);
      }
    };
  }
]);

And:

<title update-title></title>

Demo: http://run.plnkr.co/8tqvzlCw62Tl7t4j/#/home

Code: http://plnkr.co/edit/XO6RyBPURQFPodoFdYgX?p=preview

Even with $stateChangeSuccess the $timeout has been needed for the history to be correct, at least when I've tested myself.


Edit: Nov 24, 2014 - Declarative approach:

app.directive('title', ['$rootScope', '$timeout',
  function($rootScope, $timeout) {
    return {
      link: function() {

        var listener = function(event, toState) {

          $timeout(function() {
            $rootScope.title = (toState.data && toState.data.pageTitle) 
            ? toState.data.pageTitle 
            : 'Default title';
          });
        };

        $rootScope.$on('$stateChangeSuccess', listener);
      }
    };
  }
]);

And:

<title>{{title}}</title>

Demo: http://run.plnkr.co/d4s3qBikieq8egX7/#/credits

Code: http://plnkr.co/edit/NpzQsxYGofswWQUBGthR?p=preview