search files as case-insensitive

[baursak]

Hello.
- I try to find out, - how can I search for files / folders as case-insensitive (e.g. 'Trump' and 'trump' simultaneously).
- I see that there is no way to do so for a nub (like 'case-insensitive' checkbox).
- Fortunately, regex string 'rump' is working. But this is about one letter. And this means that for the entire word I have to exert myself much more, e.g. [tTrRuUmMpP].
- On the other hand two standard regex approaches '/trump/i' or '(?i)(trump)' do not work. - Which regex syntax needs to be used? - Please help.
Best regards / Mike

[Mathias (Author)]

In file search matching of filename ignore cases, so Trump and truMp and TruMP is found if you enter "trump" or "trump*"
For File content you have to check the "ignore case" checkbox

Regex, I don't know.  I'm no expert,  I think the regex variant is ECMAScript  (Like the one in JavaScript)