Google SWE interview for frontend focused role

I am interviewing with Google India for SWE generalist role with frontend focus. The recruiter told me that the interview is common even though I'm more of a Javascript person and I should concentrate on DS and Algos. I prepared them and took up the phone interview, but I got asked more of JS questions with focus on using closures. Anyway, I cleared that and now I have on site in a few weeks. I am not sure now, if I should concentrate only on DS and Algos or can I expect any surprises. Anyone who have taken up these interviews, kindly help with what other things I should prepare on. I will probably be interviewed by frontend people, since I will be whiteboarding in JS.