I can't really understand what I should return from trackBy. Based on some examples I've seen on the web, I should return the value of some property on the object. Is it right? Why should I get ind...

tried every syntax i can guess couldnt make it works ! <!--- THIS WORKS FINE ---> <ion-card *ngFor="#post of posts"> {{post|json}} </ion-card> <!--- BLANK PAGE ---> <io...

I don't really understand how track by works and what it does. My main goal is to use it with ng-repeat to add some precision.

The trackBy function (e.g. in an ngFor) provides two arguments: index and item (from the collection being iterated over). Is there a way to pass additional information (as parameters?) to th trackB...

Since recently, the Angular styleguide-lint-extender "Codelyzer" is throwing warnings when you do not have a trackBy-function implemented on every *ngFor. I am wondering why this is considered an i...

I am converting Angular 1.6 code to Angular 4 and I have an issue with a list of elements. The code in Angular 1.6 is: <select ng-model="$ctrl.level" ng-options="item as item.label for item in...

Here is the code <tr ng-repeat="collection in collections | orderBy:'-modifiedDate' track by $index" ng-init="listIndex = $index"> If I remove orderBy:'-modifiedDate', the deletion on a sp...

I have a problem with angular ng-repeat directive. Currently I work on some project where from the API I get a list of items (some times it could be 1k items) and this list should be refreshed ever...

I have this angular select: <select ng-model='obj.status' ng-options='status.code as (status.code + " " + status.phrase) for status in status_codes.data track by status.code'>` My $scope.s...