← localStorage Isn't Free — It's Blocking Your Main ThreadQuiz
localStorage vs IndexedDB — the main-thread cost
Eight questions on why localStorage.setItem blocks the page, why debouncing doesn't fix it, and how IndexedDB avoids the freeze.
questions8
pass mark70%
resultsat the end
No account needed. Answer all 8 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.