JSFiddle - React, Tailwind, and code Playground

HTML

<form action="" method="post" name="form" id="form">
				<input type="text" placeholder="Your email*" name="email" id="email">
			
	
				<input type="text" placeholder="Your name*" autocomplete=off name="name" id="user_name">
			
			
					<button type="submit" id="signup" value="Sign me up!">Sign Up</button>

			
		</form>

JavaScript

if ($.trim($("#email, #user_name").val()) === "") {
		$('#form').submit(function(e) {
			e.preventDefault();
			alert('you did not fill out one of the fields');
		})
	}