Merge pull request #1490 from alphagov/prevent-duplicate-form-submissions

Prevent doubling clicking form submissions

app/assets/javascripts/preventDuplicateFormSubmissions.js

@@ -0,0 +1,30 @@
+(function() {
+
+  "use strict";
+
+  let disableSubmitButtons = function(event) {
+
+    $submitButton = $(this).find(':submit');
+
+    if ($submitButton.data('clicked') == 'true') {
+
+      event.preventDefault();
+
+    } else {
+
+      $submitButton.data('clicked', 'true');
+      setTimeout(renableSubmitButton($submitButton), 1500);
+
+    }
+
+  };
+
+  let renableSubmitButton = $submitButton => () => {
+
+    $submitButton.data('clicked', '');
+
+  };
+
+  $('form').on('submit', disableSubmitButtons);
+
+})();