Online HTML Editor

<!DOCTYPE html> <html> <head> <title>Input Datetime readOnly</title> </head> <body> <form> Final Exam Datetime: <input type="datetime" id="datetimeSelect" value="2023-08- 24T10:30Z"> </form> <button onclick="finalizeDatetime()">Confirm Datetime</button> <div id="divDisplay"></div> <script> var divDisplay = document.getElementById("divDisplay"); var inputDatetime = document.getElementById("datetimeSelect"); divDisplay.textContent = 'Exam Datetime Finalized: '+inputDatetime.readOnly; function finalizeDatetime() { inputDatetime.readOnly = true; divDisplay.textContent = 'Exam Datetime: '+inputDatetime.value; } </script> </body> </html>