JSFiddle - React, Tailwind, and code Playground

JavaScript

function Foo() {
    var blabla = 10; // local

    this.getBlabla = function () { 
        return blabla; // exposes blabla outside
    }
}


var FooBar = new Foo();
var what_is_blabla = FooBar.getBlabla(); //what_is_blabla will be 10

alert(what_is_blabla);