Angular identifies when a user navigates away from a page

Currently, I am utilizing Angular 1.5 along with ui-router. My goal is to identify when a user exits a route. The code snippet I have at the moment looks like this:

$scope.$on("$stateChangeSuccess", function () {
      if (!$scope.flag) {
        //...
        $scope.do_work(reason);
      }
    });

Unfortunately, this approach is not entirely effective because upon navigation to the said route, $scope.flag is already set to false, causing the function to execute incorrectly. Is there a conventional method to trigger a function only when a user leaves a specific route and not when they enter it?

javascriptangularjsangular-ui-router

Answer №1

If you want to manipulate the state of your application while transitioning out, consider utilizing the onExit hook provided by ui-router. Keep in mind that it does not allow access to the $scope.

To work around this limitation, I suggest creating a service to store shared data. Update this shared data within the onExit hook of your desired state. This way, you can then access the same service from your controller.

$stateProvider.state("contacts", {
  template: '<h1>Dummy Template</h1>',
  controller: 'myCotroller',
  onExit: function(sharableService){
    //... perform actions using the sharableService variable...
  }
})

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