The power of Angular controllers lies in their ability to facilitate two-way

Currently, I have a controller that acts as a wrapper for ui-router and manages its flow, similar to a menu bar. When a user clicks on a menu item, a function is triggered that changes the ui-router state and broadcasts an event to the inner controllers. Each inner controller within this ui-router can listen for and respond to this event. However, the inner controllers perform validation on this event, and if the validation fails, I am unable to revert the state change. How can I address this issue? Thank you.

update: I have attempted using the ui-router $stateChangeStart event as a solution, but it remains incomplete. Now, a new issue has arisen. The main controller, which houses the ui-router and menu bar, includes a progress bar. This main controller is registered to $stateChangeStart to manage the progress bar, but the child view, also registered to the event, is preventing the default action. As a result, the controllers are now in an inconsistent state. The main controller has already handled the progress bar, but the view itself has not changed. Any advice on how to proceed?

javascriptangularjsangular-ui-routerbroadcast

Answer №1

In the world of front-end development, the ui-router is known to generate a special $stateChangeStart event.

If needed, your controllers are capable of using event.preventDefault() to halt the transition process. 

$scope.$on('$stateChangeStart',
    function(event, toState, toParams, fromState, fromParams){
        if (notOK ) {
            event.preventDefault();
        };
})

To delve deeper into this topic, you can visit the UI-Router state.$state API Reference -- events - $stateChangeStart

Answer №2

Trigger a cancellation event by utilizing the $rootScope and handle the event within your menu controller.

$rootScope.$broadcast('cancelStateChange');

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