The Angular $digest cycle ensures that the entire view is refreshed, rather than just a portion

Encountering a peculiar problem in Angular 1 where the script is getting stuck in an endless loop, eventually causing the browser to freeze.

Here's what I'm attempting:

<script>
    $scope.A = true;
    $scope.B = [{blah},{blah}];
    $scope.updateB = function(){
        $scope.B.push({blah});
    }
    $scope.D = function(key){
        $scope.A = false;
        return key.name;
    }
</script>

    <div ng-if="A">
        <button ng-click="updateB()"></button>
    </div>

    <div ng-repeat="key in B">
      {{D(key)}}
    </div>

In essence, I aim to hide the first div after the button is clicked. While it could be achieved within the "updateB" function, my preference is to accomplish it in "D", post expression evaluation. This, however, result in an infinite loop.

Any suggestions on what might be going awry here?

Answer №1

The reason for this behavior is that your function D() gets executed during each angular digest cycle, even if there is only one element in B. If B has no elements, then your function will not be executed.

To gain a better understanding of how the digest cycle operates, you can refer to these resources: The Digest Loop and $apply as well as Understanding the Digest Cycle

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