angularjs - What's the best way to cancel event propagation between nested ng-click calls?

Sunday, June 16, 2019

angularjs - What's the best way to cancel event propagation between nested ng-click calls?

Answer

Here's an example. Let's say I want to have an image overlay like a lot of sites. So when you click a thumbnail, a black overlay appears over your whole window, and a larger version of the image is centered in it. Clicking the black overlay dismisses it; clicking the image will call a function that shows the next image.

The html:

The javascript:

function OverlayCtrl($scope) {
    $scope.hideOverlay = function() {

        // Some code to hdie the overlay
    }
    $scope.nextImage = function() {
        // Some code to find and display the next image
    }
}

The problem is that with this setup, if you click the image, both nextImage() and hideOverlay() are called. But what I want is for only nextImage() to be called.

I know you can capture and cancel the event in the nextImage() function like this:

if (window.event) {
    window.event.stopPropagation();
}

...But I want to know if there's a better AngularJS way of doing it that won't require me to prefix all of the functions on elements inside the overlay with this snippet.

Answer

What @JosephSilber said, or pass the $event object into ng-click callback and stop the propagation inside of it:

$scope.nextImage = function($event) {
  $event.stopPropagation();
  // Some code to find and display the next image
}

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Sunday, June 16, 2019