JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
	<form id="login" method="POST">				
		<input type="text" name="name" id="name" placeholder="Enter your name" required="required"/>
		<input type="text" name="email" id="email" placeholder="Enter your email" required="required"/>	
		<div style="display:none"><input type="submit" value="submit" /></div>
	</form>
</div>
<div id="bottom">
	<button class="btn" id="btn-reg">Register</button>
</div>

JavaScript

// Recommended way to submit a form by button click
window.addEventListener("DOMContentLoaded", function () {
	var regform = document.getElementById("login");
	document.getElementById("btn-reg").addEventListener("click", function () {
		regform.submit();
	});
});