Two way binding doesn't work for programmitically changed input values

I’m submitting a…

[ ] Regression (a behavior that used to work and stopped working in a new release)
[x ] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

Current behavior

If I change an input’s value programmically, the model that is bound to said value does not update.

Expected behavior

I expect two way binding to cover both user input changes and programmic changes to the input.

Minimal reproduction of the problem with instructions

Simply use two way binding on an input, then change value programmically: <input (input)=“onChange($event, 5, 2, true)” [(ngModel)]=“funcType.hours”> onChange(event) { event.currentTarget.value = “TEST!!!” }

What is the motivation / use case for changing the behavior?

Being able to dynmically validate and change/format user’s data easily

Environment

Angular version: X.Y.Z


Browser:
- [ x] Chrome (desktop) version 64.0
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX
 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[bcandullo]

Being able to dynmically validate and change/format user's data easily Reactive forms has a much better api for this.

[maximedupre]

I think this is a bug, not a feature. Please see referenced ticket.