JSFiddle - React, Tailwind, and code Playground

JavaScript

function Apple(){
    this.name="apple";
}
function Orange(){
    this.name="orange";

    this.apple = new Apple();
    this.apple.onCalled=function(){
        alert(this.name);
    }
}
Orange.prototype.onCalled=function(){
    this.apple.onCalled.call(this);
}
var orange = new Orange();
orange.onCalled();