Are you looking for a way to prevent the default behavior of an event in angular-ui-router 1.0.x? Check out

Recently, I made a change in my code where I replaced $stateChangeStart with $transitions.onStart

$rootScope.$on('$stateChangeStart', function(e, ...){
     e.preventDefault();
     // other code goes here...
});

Now, the updated code looks like this:

$transitions.onStart({}, function(tras){
     // need a code equivalent to e.preventDefault
     // need a code to identify event.defaultPrevented 
     // other code goes here...

     // get parent states
     _o.util.getAncestorStates(toState.name, true).reverse()
        .forEach(function (state) {
           // certain condition to call event.preventDefault()

           if(event.defaultPrevented) {....}
     });
});

I believe, we can prevent the transition by using return $q.reject() instead of e.preventDefault(), but I am not sure how exactly the code below return $q.reject() will be executed.

Furthermore, I am curious about how to replace event.defaultPrevented.

I suspect that something needs to be done with transition.promise, but the process is not clear to me.

Unfortunately, understanding the information in the official documentation at seems challenging for me. Can anyone provide a clearer explanation or suggest an alternative solution for the mentioned code?

Answer №1

If you're deciding between two options based on your logic, here are some suggestions:

  • Starting from angular-ui-router 1.0.3, you have the option to utilize $transition.abort() for a cleaner way to abort state change after an async operation.

    $transitions.onStart({}, function($transition) {
        $transition.abort();
        //more code...
    });
    
  • In addition, as mentioned by @tanmay in the comments, you can simply use return false to cancel the transition. This method works even with non-stable versions such as 1.0.0.beta and 1.0.0.rc. (Refer to the ui-rooter docs for more information)

    $transitions.onStart({}, function($transition) {
        //code ...
        return false;
    });
    

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