Yarin Yarin - 5 months ago 146
AngularJS Question

Angular model doesn't update when changing input programmatically

I have a text input bound to a model value, but I can't figure out how to change the input value programmatically and have the change propagate to the model.

I understand that because I'm updating the value external to the angular scope that I need to explicitly call

$scope.$apply()
, but it's not working.

HTML:

<input id="test_input" ng-model="test_value">


Controller:

$scope.test_value = 'abc'; // starting value


Console:

$('#test_input').val('xyz');
$('#test_input').scope().$apply();
$('#test_input').scope().test_value;
-> 'abc';

Answer

ngModel listens for "input" event, so you need to trigger that event after setting the value:

$('#test_input').val('xyz');
$('#test_input').trigger('input'); 
$('#test_input').scope().test_value;
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