Regular expression to get a class name from html

Question

I know my question might look like a duplication for this question, but its not
I am trying to match a class name inside html text that comes from the

Answer 1

This may not be a solution for you, but if you aren't set on using a full regex match, you could do (assuming your examples are representative of the data you will be parsing) :

function hasTheClass(html_string, classname) {
    //!!~ turns -1 into false, and anything else into true. 
    return !!~html_string.split("=")[1].split(/[\'\"]/)[1].split(" ").indexOf(classname);
}

hasTheClass("
", 'b'); //returns true