JSFiddle - React, Tailwind, and code Playground

HTML

<a id="a" href="#">Click Me</a>

JavaScript

function addEvent(element, type, fn) {
    var old = element['on' + type] || function() {};
    element['on' + type] = function () { old(); fn(); };
}

var a = document.getElementById('a');

function sayHello(){
    alert('hello');
}

function sayGoodMorning(){
    alert('Good Morning');
}

addEvent(a, 'click', sayHello);
addEvent(a, 'click', sayGoodMorning);