JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" name="email" class="box" id="email" placeholder="Enter your email">
<input type="text" name="confirmEmail" class="box" id="confirmEmail" placeholder="Enter your email again">

JavaScript

document.getElementById("confirmEmail").addEventListener('paste',function(e){e.preventDefault()});
document.getElementById("confirmEmail").addEventListener('drop',function(e){e.preventDefault()});
document.getElementById("email").addEventListener('paste',function(e){e.preventDefault()});
document.getElementById("email").addEventListener('drop',function(e){e.preventDefault()});