Take this with a grain of salt, I know from other comments that people have varying experiences (including someone who unexpectedly received a LeetCode question) I botched this. Nothing I did was correct. If I could go back in time, I would tell myself the following: -Don't bother with LeetCode, the first guide you received was misleading (though, again, it depends on the interviewer and this could be wrong for others) -They really do let you select a framework of your choice. Don't be pessimistic and assume the interviewer will ignore HR and ask you to use React no matter what -You may want to specify framework version -(again, could be specific to one person) Review JavaScript fundamentals first, and frameworks second -For me it was HackerRank, not Codesandbox. You're not getting multiple files to start with, and you are certainly not screen sharing as you use an environment you are used to, complete with something like VSCode and the option to use npm or yarn to install libraries into your project -You can use things like MDN on the spot