Earlier quoted context omitted.
I like this concept - have a one time download link, and a timer to submit solution within an hour or two. Seems like a good balance of fair and realistic (assuming you can't Google for solutions and all).
"can't Google for solutions"? I will never understand the desire to handicap interviewees like that. I recently passed an live-coding interview in which I was asked to use an unfamiliar library; bc it was open-book I was able to look up its docs and use it to solve the problem. At one point I also hopped onto MDN to confirm a browser API. The ability to search and effectively leverage available resources is fundament…
I do strongly agree that people should be able to use whatever resources they normally have (google, mdn, autocompleting editor, etc.). This is how they would work on the job. Getting quizzed on easily referenced random trivia about language features is so dumb.