JSFiddle - React, Tailwind, and code Playground

HTML

<button>See handler code!</button>
<textarea></textarea>

CSS

textarea {
    height:600px;
    width:400px;
}

JavaScript

var $btn = $("button"),
    $out = $("textarea");

function output(){ 
    var e = $._data($btn.get(0),"events"),
        str = "All Events"
    $.each(e,function(i,v){
        str+="\n" + i + ":" + v.toString();
        $.each(v,function(ii,vv){
            str+="\n\t" + ii + ":" + vv.handler.toString();
        })
    })
    $out.val(str);
};

$btn.click(output);
$btn.on("click mouseover mousedown blur",function(){console.log("foo");});