JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test"></div>

JavaScript

function A() {
    this.ini = function () {
        $('<button id="click" >Hi</button>')
            .click(clickfn)
            .appendTo('#test');

    }

    var clickfn = function (e) {
        alert('Hi');
    };
}
var a = new A();
a.ini();