JSFiddle - React, Tailwind, and code Playground

HTML

<form>
   <input name="Foo" value="1" />
   <input name="Parent.Child1" value="1" />
   <input name="Parent.Child2" value="2" />
</form>

JavaScript

$(function(){
    var form = document.forms[0]; 
    alert(form.Foo);
    alert(form['Parent.Child1'].value);
});