'IsNullOrWhitespace' in JavaScript?

Question

Is there a JavaScript equivalent to .NET\'s String.IsNullOrWhitespace so that I can check if a textbox on the client-side has any visible text in it?

I\'d rather do

Answer 1

You must write your own:

function isNullOrWhitespace(strToCheck) {
    var whitespaceChars = "\s";
    return (strToCheck === null || whitespaceChars.indexOf(strToCheck) != -1);
}