how can i read a property of an object in javascript

objects [ {
firstName: "Kristian",
lastName: "Vos",
number: "unknown",
likes: ["JavaScript", "Gaming", "Foxes"],
}….]

if this is my object, i need to read the word "firstName" and not the value of "firstName"

i know how to output the value of firstName ( objects[0].fisrtName ) = "Kristian"

but what i really need to read is if the object has a property called firstName, in case that the object doesnt have that property.

thanks

>Solution :

I think you code isn’t actually object since you use [ ], it is more likely an array contain object.

This code should work, if you mistype the [ ], just use Object.keys(test)[0] instead.

let test = [{
  firstName: "Kristian",
  lastName: "Vos",
  number: "unknown",
  likes: ["JavaScript", "Gaming", "Foxes"]
}]
console.log(Object.keys(test[0])[0])