How can I check for an empty/undefined/null string in JavaScript?

Question

I saw this question, but I didn\'t see a JavaScript specific example. Is there a simple string.Empty available in JavaScript, or is it just a case of checking f

Answer 1

To check if it is exactly an empty string:

if(val==="")...

To check if it is an empty string OR a logical equivalent for no-value (null, undefined, 0, NaN, false, ...):

if(!val)...