What Library do I need for explode?

I can't figure out how to use the jQuery documentation. For example, I want to learn how to use "explode" but when I put that word in the search box it gives me examples but does not tell me which library I need to download in order to use it. Am I missing something basic when I look something up? How do I find out which library I need to get depending on which effect I want to try?

Thank you!