← Your 'Save' Button Makes Copies. The File System Access API Doesn't.Quiz

File System Access API: real files, real writes

Eight questions on why the classic download-link "save" can't overwrite a file, how showOpenFilePicker and createWritable actually work, and which browsers support any of it.

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.