Clouser tutorials

Today I had my first interview as junior Front-End
It was quite simple, next step I’m waiting next interview where I will must to solve some exercises
Main point, as I understudy will be around JS function clouser concept.
May somebody could suggest good source for practice Clousers?

I think your probably meant to say closure.

It’s basically a function that returns a function. The returned function still has access to variables to the function that was called.

You will get tons of articles if you google search something like closure in js.

Here is one example.