JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myDiv" onclick="this.Obj.foo(); return false;">Click me</div>

JavaScript

function Obj ( node ) {
    var _data = node.Obj = [];
    
    _data.foo = function(){ alert(this) }
    return _data;
}

var tmpObj = Obj( document.getElementById( "myDiv" ) );
tmpObj.push("123");