Adjust the height of an element when an animation is initiated (Angular)

Check out the transition I've set up to smoothly slide between my views: https://plnkr.co/edit/yhhdYuAl9Kpcqw5tDx55?p=preview

To ensure that both 'panels' slide together, I need to position the view absolutely. However, this causes the view container's height to default to 0. My goal is to determine the view's height at the start of the animation and adjust the outer container's height accordingly. The challenge lies in identifying the element's height and executing this adjustment when the animation begins.

I attempted to replicate others by creating a directive with a link function that receives the element as an input. Unfortunately, using "querySelector" resulted in a null return value.

myApp.directive('viewContainer', function() {
    return {
        restrict: 'A',
        scope: {
          containerHeight: "="
        },
        link: function(scope, element) {
            scope.$on("$locationChangeSuccess", function() {

                //scope.height = element[0].querySelector('#view-box').offsetHeight;

                //scope.containerHeight.height = scope.height;
            });
        },
        template: "<div id='view-box' ng-view></div>"
    };
});

I'm currently relying on

scope.$on("$locationChangeSuccess"...)
but I am uncertain if this accurately signifies the start/end of the animation. Can anyone provide guidance on achieving this task? I explored a similar scenario discussed here:
Animating ui-view without position:absolute
However, references to $stateChangeSuccess were unclear, leaving me unsure of the approach used.

Your assistance would be greatly appreciated. Thank you!

Answer №1

After some experimenting, I found a workaround to solve this:

  • element[0].querySelector('#view-box').offsetHeight;
    was not providing the desired result initially, likely due to the view not being fully rendered yet. To bypass this issue, I introduced a $timeout and accessed
    element[0].querySelector('.ng-enter').offsetHeight
    , allowing me to capture the height of the entering view for use in my container's ng-style.
  • While $locationChangeSuccess serves its purpose as a location change event, it does not inform me when an animation completes. Surprisingly, I realized that knowing the exact end of the animation is unnecessary for my needs at the moment.

If anyone has a more efficient solution that eliminates the need for a timeout, I would greatly appreciate your input. Thank you!

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