I don't understand why neither site uses accessible text for the emoticon. I think they're text but sealed by css/html from text highlighting for the "copy to c

I don't understand why neither site uses accessible text for the emoticon. I think they're text but sealed by css/html from text highlighting for the "copy to clipboard" action. What if I only want part of the emoticon? What if I want to find the one I want (in textfac.es) by using my browser find?