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    Now this is just pure gold. This information should be in official documentation in Cookbook/Component Interaction section on angular.io website. Commented Jun 7, 2016 at 10:32
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    Amazing! However, the updates weren't happing in my parent at first. Apparently it's very important that the var name of the @Output() event is the exact same as the input var but with 'Change' behind it. Is this described somewhere by Angular? Commented Aug 4, 2016 at 11:55
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    @deadconversations, yes, it is mentioned here -- scroll down to the second green-bar note. Commented Aug 4, 2016 at 14:16
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    If parent component have used the variable in *ngFor ,it is not getting updated . Commented Mar 20, 2017 at 13:50
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    Those who are looking for documentation angular.io/guide/template-syntax#two-way-binding--- Commented Aug 2, 2017 at 12:48