JSFiddle - React, Tailwind, and code Playground

JavaScript

function a() {
    this.say = function () {
        alert("hello");
    };
}

a.prototype.what = function () {
    alert("234234");
};

function b() {}

//b.prototype = Object.create(a);
//b.prototype = a;

var b1 = new b();

b1.say();