Topic: JavaScript – Page 15

A cheat sheet for JavaScript lookahead and lookbehind regular expressions.

HTML input elements hold references to their labels if there are any

The relatedTarget event property gives information about the previous/next element when dealing with focus events.

If the 2nd argument of String.prototype.replace is a string replacement patterns can create hard to find bugs

The omission of the error argument in try/catch JavaScript expressions is now supported in mayor browsers.