Required former knowledge

I’m interested in starting the frondend developement course here and wanted to know what is the required knowledge for that. I’ve learned some java through an intro course and solving some questions in all levels at leetcode for a couple of months.
The main question is if javascript basic course is enough to get started or should I also need to learn CSS and HTML

Since frontend development involves, HTML, CSS, and JavaScript, you definitely need to learn CSS and HTML if you have no experience with them.

i think you should also learn CSS and HTML cause its also part of the frontend development it will really help you.