Javascript trim

Now a days almost all browsers support trim function. e.g.

 "   Leading and Trailing whitespace    ".trim(); 

will result

"Leading and Trailing whitespace"


If the trim function is not supported you can use replace function with regular expression:

 "   Leading and Trailing whitespace    ".replace(/^\s+|\s+$/g, ''); 

The regular expression modifier `g` is very important to be effectively removing the trailing white spaces.