In web development, a common user experience bug is the Double Submit problem. When a user clicks a submit button on a form, if the connection is slow, they might get impatient and click it again. This can trigger duplicate database entries, double financial transactions, or multiple API hits.
To prevent this, you must instantly disable the submit button once the click is received, preventing any subsequent clicks while the request is in progress. Once the form processing is simulated or finished, the user should be notified with a completion message.
