← Your Tabs Each Open Their Own WebSocket. navigator.locks Elects One.Quiz
Tab leader election — navigator.locks & BroadcastChannel
Check what you took from the post: how navigator.locks elects and fails over a leader tab, and why a shared BroadcastChannel doesn't hear its own messages.
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.