x
<html><body>E-mail: <input type="email" id="myEmail"><p>Click the button to set the email field to read-only.</p><p><strong>Tip:</strong> To see the effect, try to type something in the email field before and after clicking the button.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { document.getElementById("myEmail").readOnly = true;}</script></body></html>