My directive, named 'myObject', is supposed to log the offsetHeight of its target element. However, it's not working as expected. I suspect it's because the height is being calculated before the element has any content.
Is there a solution to this issue that doesn't involve using a timeout? Are there any built-in methods to address this problem?
One issue is that ng-repeat renders lazily and the link function fires before that process completes. To solve this problem, you can implement a watcher that evaluates the value of elem[0].offsetHeight on each digest cycle. This way, when ng-repeat finishes rendering, it triggers a digest cycle and updates the callback due to the change in the value of elem[0].offsetHeight.
Custom Directive Example
var app = angular.module('plunker', []);
app.directive('myObject', function(){
return {
restrict: 'A',
link: function(scope, elem){
var calculateHeight = scope.$watch(function(){
return elem[0].offsetHeight;
}, function(newVal, oldVal){
//custom code goes here.
console.log(newVal, oldVal);
calculateHeight(); //deregistering watcher for performance reasons
})
}
};
});
Another approach is to add another directive to the ng-repeat element which will $emit an event once it finishes rendering. Then, you can have an event listener inside the directive to calculate the height based on this event.
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