Shadowing properties

If you define a property directly on an object that already exists in its prototype, the new property will shadow the prototype's property: const myDate = new Date(1995, 11, 17); console.log(myDate.getYear()); // Outputs: 95 myDate.getYear = function () { console.log("Something else!"); }; myDate.getYear(); // Outputs: Something else! Here, the getYear() method defined on myDate shadows th...