JSFiddle - React, Tailwind, and code Playground

by Munawwar

JavaScript

function A() {
    this.message = "hi";
};
A.prototype = {
    message: "bye"
};

var obj1 = new A();
alert(obj1.message);  //"hi"


alert(obj1.hasOwnProperty('message') ? 'true' : 'false'); //true
delete obj1.message;
alert(obj1.message); //"bye"
alert(obj1.hasOwnProperty('message') ? 'true' : 'false'); //false