issue - adding leetcode standard problem in js

[denyshubh]

Please search if an issue has already be placed before adding another issue.

If you want to add an algorithm to the repository.
Please include the following in the issue.

Title:

Algorithm (Language)

Body:

Include the specific variant of the algorithm you want to add.

Are you working on this? - Yes/No
(If you are going to work on the issue yourself, make sure you comment on the issue to let others know.
We do not want multiple people to be working in the same issue without notice.)