This character is "OGHAM SPACE MARK"[1], which is a space character. So the code is equivalent to alert(2+ 40). From what I know, any unicode character in the Z

This character is "OGHAM SPACE MARK"[1], which is a space character. So the code is equivalent to alert(2+ 40). From what I know, any unicode character in the Zs class is a white space character in JS[2], but there don't seem to be that many[3]. However, JS also allows unicode characters in identifiers[4], which lets you use interesting variable names like ಠ_ಠ [1]: https://codepoints.net/U+1680 https://codepoints.net/U+1680 [2]: https://www.ecma-international.org/ecma-262/6.0/#sec-white-s... https://www.ecma-international.org/ecma-262/6.0/#sec-white-s.... [3]: https://codepoints.net/search?q=&na=&int=&gc[]=Zs&Bidi_M=&Bi... https://codepoints.net/search?q=&na=&int=&gc[]=Zs&Bidi_M=&Bi.... [4]: https://mathiasbynens.be/notes/javascript-identifiers-es6 https://mathiasbynens.be/notes/javascript-identifiers-es6