JSFiddle - React, Tailwind, and code Playground

HTML

<div>text</div>

JavaScript

function doSomething() { console.log('yay'); }

var eventName,
    prefix;

for (var key in document) {
    prefix = key.substr(0, 2);
    
    if (prefix === "on") {
        eventName = key.substr(2);        
        document.addEventListener(eventName, doSomething, true);
    }
}