I want to create a simple text templating that allow defining placeholders using {0}, similar to what .Net does using string.format method.

This regular expression works find in python but not javascript and I’m confused as to why that’s the case

I want TypeScript code which uses Regular Expression to first understand repeated words or numbers in a string (like ‘2024’ or ‘May’) and then replace the first matched ones with empty.
Examples:

So basically, I have an autocomplete field in my application. When a result from the autocomplete matches the query, then the result is highlighted (bold in my case).