JSFiddle - React, Tailwind, and code Playground

by chauhangs

HTML

<fieldset>
<legend>Contact Information</legend>
<form action="#" id="contactInfo" onsubmit="checkform()">
First Name: <input type="text" name="fname" id="fname"><br />
Last Name: <input type="text" name="lname" id="laname"><br />
Email: <input type="text" name="email" id="email"><br />
<button type="submit">Submit</button>
</form>
</fieldset>

JavaScript

function checkform(form) 
 {
  if(document.forms[0].email.value == ""){
  alert("Please enter your email address.");
  document.forms[0].email.focus();
  return false;
  }
  }