← Your Required Field Turns Red Before You Type AnythingQuiz
:user-invalid vs :invalid — form validation timing
Check what you took from the post: why plain :invalid fires before a user does anything, what actually counts as "interaction" for :user-invalid and :user-valid, and why a form reset wipes the styling but not the value.
questions7
pass mark70%
resultsat the end
No account needed. Answer all 7 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.