How to set a selected option of a dropdown list control using angular JS

I hope I understand your question, but the ng-model directive creates a two-way binding between the selected item in the control and the value of item.selectedVariant. This means that changing item.selectedVariant in JavaScript, or changing the value in the control, updates the other. If item.selectedVariant has a value of 0, that item should get selected.

If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:

JS:

$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$scope.selectedOption = $scope.options[1];

HTML:

<select data-ng-options="o.name for o in options" data-ng-model="selectedOption"></select>

This would leave the "b" item to be selected.

I don't know if this will help anyone or not but as I was facing the same issue I thought of sharing how I got the solution.

You can use track by attribute in your ng-options.

Assume that you have:

variants:[{'id':0, name:'set of 6 traits'}, {'id':1, name:'5 complete sets'}]

You can mention your ng-options as:

ng-options="v.name for v in variants track by v.id"

Hope this helps someone in future.