es2022

hasOwnProperty returns a boolean value indicating whether the object on which you are calling it has a property with the name of the argument. For example: var x = { y: 10 }; console.log(x.hasOwnProperty(“y”)); //true console.log(x.hasOwnProperty(“z”)); //false However, it does not look at the prototype chain of the object. It’s useful to use it when … Read more