[Fix] Prevent clicking of signup button repeatedly

static/build/index.js

@@ -60,6 +60,21 @@ function checkUsernameAvailability() {
         }
     };
     xhr.send();
+     // Disable the button to prevent multiple clicks
+     submitBtn.disabled = true;
+
+     // Show the spinner
+     const spinner = document.createElement('i');
+     spinner.classList.add('fas', 'fa-spinner', 'fa-spin');
+     submitBtn.innerHTML = '';
+     submitBtn.appendChild(spinner);
+ 
+     // Enable the button and remove the spinner after 5 seconds
+     setTimeout(function () {
+        submitBtn.disabled = false;
+        submitBtn.innerHTML = 'Sign Up';
+     }, 5000);
+     sleep(5000).then(() => { submitBtn.disabled = false; });
 }
 
 function sleep(ms) {