Monitoring the height of an element within an Angular directive

I am attempting to achieve something similar to the following:

myindex.html

<div ng-controller="MyController" menu>
    <input ng-model="myVar"/>
    <div slimscroll="{'height':menuheight,'alwaysVisible':true}">
        <div id="menucontent" menu-content>
        </div>
    </div>
</div>

Whenever there is text in the input field, it should trigger filtering on the menu-content directive. As it filters, the height of menu-content will change.

Menu Directive:

angular.directive('menu', function(){
    return function (scope, element) {
        var menuContentHeight = $("#menucontent").height();
        scope.menuContentHeight = function(){
            return $("#menucontent").height();
        };

        scope.$watch(scope.menuContentHeight, function(newValue, oldValue) {
            if (newValue !== oldValue) {
                console.log('Changed!');
                menuContentHeight = newValue;
                adjustHeight();
            }
        },true);

        function adjustHeight(){
            // Perform necessary height adjustment
        }
    };
});

Therefore, my goal is to utilize scope.watch to monitor any changes in height and immediately update them. While my code functions correctly, it unfortunately does not update instantly.

Is there a way for me to ensure that the height adjustment updates instantly whenever a change occurs?

Answer №1

Implement $scope.apply() in your code.

scope.$watch(scope.menuContentHeight, function(newValue, oldValue) {
            if (newValue !== oldValue) {
                console.log('Change detected!');
                menuContentHeight = newValue;
                adjustHeight();
                $scope.apply();  //trigger digest cycle
            }
        }, true);

This tip could prove beneficial to you.

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