Highlight identical words which are case insensitive

HI, I am trying to highlight identical words and I am using highlightSelectionMatches: {showToken: /\w/}.
But, this only highlight identical words which matches the case.

I am wondering how I can make it to highlight words which are case-insensitive.

That’s not a feature that the match-highlighter module currently has.

Thank you for your quick response.
I was wondering since showToken picks any RegEx which is mentioned here ("/\w/"), I tried to change this RegEx to ignore case, but, it did not work.

It makes more sense when you clarified it.