Checking something isEmpty in Javascript?

Question

How can I check if a variable is empty in Javascript? Sorry for the stupid question, but I\'m a newbie in Javascript!

if(response.photo) is empty {
    do so         


        

Answer 1

Combining answers from @inkednm into one function:

   function isEmpty(property) {
      return (property === null || property === "" || typeof property === "undefined");
   }