When filling in a very long form which has instant field validation (and required fields are marked with an asterisk), should validation take place if user focuses the field and without typing anything in moves focus to another field? In other words - should validation be performed when there is nothing to validate?
Answer
It makes no sense trying to validate something which you know doesn't exist in the first place.
Validation should take place when either the focus is changed, or there is some pause in entering information (e.g. 2 seconds).
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