How to highlight all text occurrences in a HTML page with JavaScript?

Question

I really thought this would have been answered years ago, still I did not find any solution:

I want to highlight (i.e. make a colored background) all occurrences of

Answer 1

The best option for doing this is usually, somewhat surprisingly, to not do it.

Rely instead on the built-in search feature of the web browser: This ensures that users have a consistent experience, and saves you a lot of trouble in having to double the work that has already been done to allow for this.