Question

How can I check a string is a class or an ID then strip them off to get the name? For instance,

$string = ".isclass"; 
$string = "#isid";

if($($string).indexOf('.') != -1)) alert($($string).substring(1));

Answer 1

If you want to know if the string starts with a . or # and then use the remained, you could use String.match() like so:

if (matches = $string.match(/^([.#])(.+)/)) {
    // matches[1] will contain either . or #
    alert(matches[2]);
} else {
    // it's something else
}