I’ve gone through a lot of frontend loops myself, and through FrontendLead I’ve talked to hundreds of engineers about how their interviews went, including interviewers. One pattern keeps coming up: most candidates who don’t pass aren’t failing because they didn’t know an answer.
They fail because of a handful of repeat mistakes that have nothing to do with how smart they are. Here are the ones I see most, round by round, and how to avoid them.
JavaScript coding rounds
1. Coding before clarifying
The candidate reads “implement debounce” and starts typing immediately. Ten minutes later, the interviewer asks “should it support a leading-edge call?” and half the code needs to change.
Do this instead: spend 2-3 minutes asking about inputs, outputs, and edge cases. Write a couple of example calls with expected results. It feels slow, but it saves time, and interviewers explicitly look for it.
2. Only handling the happy path
The code works for the example and breaks on an empty... premium content.
