JSFiddle - React, Tailwind, and code Playground

HTML

<div>  
  <label>Password:</label>
  <input name="password" id="password" type="password" onkeyup='validatePassword();' />
</div>
<br/>
<div> 
  <label>Confirm password:</label>
  <input type="password" name="confirm_password" id="confirm_password"  onkeyup='validatePassword();' /> 
  <span id='message'></span>
</div>

JavaScript

$('#password, #confirm_password').on('keyup', function () {
  if ($('#password').val() == $('#confirm_password').val()) {
     $('#message').html('Matching').css('color', 'green');
  } 
  else 
  {
     $('#message').html('Not Matching').css('color', 'red');
  }
});