JSFiddle - React, Tailwind, and code Playground

JavaScript

function Test() {
    var hello = "org";
}

Test.prototype.set = function (value) {
    return hello;
}
Test.prototype.get = function (value) {
    hello = value;
}

var test = new Test();
console.log(test.get());
test.set("new");
console.log(test.get());