← Your Canvas Is Freezing the Page. OffscreenCanvas Fixes That.Quiz
OffscreenCanvas: rendering off the main thread
Seven questions on why canvas drawing blocks the page by default, what transferControlToOffscreen() actually moves, and when the extra complexity is and isn't worth it.
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.