Knockout Validation Only If a specific button is pressed

Question

https://github.com/ericmbarnard/Knockout-Validation/wiki/Native-Rules

I am using the knockout validation on my MCV3 page. The situation I have is that I have two buttons

Answer 1

The onlyIf option could work here:

FirstName: ko.observable().extend({ 
    required: {
        params: true,
        onlyIf: function(){ return someFlagIsTrue; }
    }

You would need to set the someFlagIsTrue from your click event or other means.