JSFiddle - React, Tailwind, and code Playground

JavaScript

// http://daniel.steigerwald.cz (MIT Licensed)

var Person = function(name) {
    this.name = name;
};
Person.prototype.name = 'noname';

var joe = new Person('Joe');

alert(joe.name == 'Joe'); // true
delete joe.name;

alert(joe.name == 'noname'); // true