To find out if an object has a specific property as one of its own property.
var school = {schoolName:"MIT"};
console.log(school.hasOwnProperty ("schoolName")); // true because schoolName is an own property on the school object
// Prints false because the school object inherited the toString method from Object.prototype, therefore toString is not an own property of the school object.
console.log(school.hasOwnProperty ("toString"));
by Luka Tatarishvili
4 years ago