JSFiddle - React, Tailwind, and code Playground

HTML

<form method="post" id="theFormID" name="theFormID" action="">
   <input type="text" id="Field1" name="Field1" />
   <input type="text" id="Field2" name="Field2" />
   <button name="submit">Add Item</button>
</form>

JavaScript

var form = document.forms[0];

var button = form.elements["submit"];


form.addEventListener("submit", function(e){
	e.preventDefault();
});

button.addEventListener("click", function(e){
	e.preventDefault();
	console.log("it's work");
});