jquery :ibegins("xyz") selector

Question

I am using bootstrap selectpicker, there for livesearch

$searchBase.not(':ibegins("search keyword")');

is being used. What exactly ibegins do in selector and how it searches inside elements?

Answer 1

It looks like ibegins is a case-insensitive selector. It transforms the search term and the search text to all uppercase and then performs the search. You can see the code for that here at line 202.

Answer 2

This is not a standard CSS pseudo class, so it is likely a custom selector defined by the author of the solution you are using. I would recommend reviewing the source code of Bootstrap SelectPicker for further clues.