ReactiveForms valueChanges in dom vs component

Question

I'm wonder if there's a way to know the difference whether valueChanges on a FormControl was triggered from the dom or the component itself. My use case is I need to do stuff() when the user changes the value, but I don't want to do stuff() if the value changed as a result of something else. Any thoughts?

I don't understand the downvotes. This is an interesting question. Unfortunately I am pretty sure that this kind of API does not exist. — Tomasz Kula
– Tomasz Kula, Commented Apr 11, 2018 at 22:03

Nobady · Accepted Answer · 2018-04-12 13:31:20Z

1

with the control ".touched"

EXAMPLE: YourModelForm.get('YourField').touched

the value becomes true when the user enters a value (first click on the field, enter the value, tab or click out of the field).

I tried with a call rest and the value remains to false, try it if you can possibly it works for your situation. :-)

answered Apr 12, 2018 at 13:31

Nobady

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jensengar · Accepted Answer · 2018-04-13 15:13:52Z

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Thanks to @Nobady, who inspired the idea. I found there's actually an option for setValue on the formControl called emitEvent. Using this, I can make it so if I update the value programmatically I can bypass the valueChanges getting called.

answered Apr 13, 2018 at 15:13

jensengar

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