← Chrome Already Has The Eyedropper You're BuildingQuiz
The EyeDropper API — pick a real screen color
Seven questions on window.EyeDropper: what it actually returns, why it needs a real click to open, how cancellation behaves, and why a plain canvas could never do what it does.
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.