JavaScript Prank / Joke [closed]

How do you prank a coworker or friend in a way that's hard to notice and fix? Preferably in JavaScript, and without having install any programs.


Greek Question Mark - Semicolon Prank

(Tested in JavaScript)

Replace one or several semicolons in a coworker or friend's code with the Greek question mark:



If you compare the two they look exactly the same: ;;

The first ; is a greek question mark, and the second ; is a normal semicolon.

The greek question mark throws a SyntaxError: Unexpected token ILLEGAL in JavaScript, and probably throws errors in other languages as well. Make sure you're saving the code file in Unicode/UTF-8.

Disclaimer: I take no responsibility for any harm caused by this prank. Have fun!