'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 can use the regex /\S/ to test if a field is whitespace, and combine that with a null check.

Ex:

if(textBoxVal === null || textBoxVal.match(/\S/)){
    // field is invalid (empty or spaces)
}