In Javascript, How to determine if an object property exists and is not empty?

Question

Suppose I have the next javascript object:

var errors = {
    error_1: \"Error 1 description\",
    error_2: \"Error 2 description\",
    error_3: \"\",
             


        

Answer 1

Here is a another good answer I found and wanted to share (after modification to fit my needs):

if ("property_name" in object_name && object_name.property_name !== undefined){
   // code..
}

So if I wanted to apply this on my example, it will look like:

if ("error_1" in errors && errors.error_1 !== undefined){
   // code..
}