I have input like this
<input type="text" name="widget.title" ng-model="widget.title" value="{{widget.title}}"/>
I want to change input value dynamically so i use that but it doesn't change the value:
$scope.widget.title = 'a';
You don't need to set the value at all. ng-model takes care of it all:
Here's the fiddle for this: http://jsfiddle.net/terebentina/9mFpp/
If you don't wan't to use ng-model there is ng-value you can try.
Here's the fiddle for this: http://jsfiddle.net/Rg9sG/1/