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

As of now there is no direct method like string.empty to check whether a string is empty or not. But in your code you can use a wrapper check for an empty string like:

// considering the variable in which your string is saved is named str.

if (str && str.length>0) { 

  // Your code here which you want to run if the string is not empty.

}

Using this you can also make sure that string is not undefined or null too. Remember, undefined, null and empty are three different things.