Java script to search multiple strings in given files/directory

Question

Can some one please point me some referral documentation/code to search multiple strings in a given multiple files from the directory using a Javascript

Answer 1

I think there should be 2 processes:
1. to loop through files ,open them and load their content to a dictionary of strings keys for the files url and values for their content.
2. a second process to loop through the content and match your string searches