Regular expression problem in words array

I am getting an error: Uncaught SyntaxError: Invalid regular expression:
words: ['my string here'] here which contains special characters in my string that caused problem of this.

Start by reproducing the invalid regular-expression error with the reported words array containing special characters, then trace how the words array is converted into a regular expression. Done means such input no longer raises the reported SyntaxError.

Written by the indexing model from the issue text.