Add HTML form validation for the registration form (#14560)

* Add HTML-level validation of username in sign-up form

* Make required fields with incorrect values more visible

* Enable HTML form validation for the registration form

* Mark agreement checkbox as required client-side

* Add minimum length to password

* Add client-side password confirmation validation

1 files changed, 10 insertions, 0 deletions

diff --git a/app/javascript/packs/public.js b/app/javascript/packs/public.js
index 3d190d2da..43b00a77d 100644
--- a/app/javascript/packs/public.js
+++ b/app/javascript/packs/public.js
@@ -99,6 +99,16 @@ function main() {
       new Rellax('.parallax', { speed: -1 });
     }
 
+    delegate(document, '#registration_user_password_confirmation,#registration_user_password', 'input', () => {
+      const password = document.getElementById('registration_user_password');
+      const confirmation = document.getElementById('registration_user_password_confirmation');
+      if (password.value && password.value !== confirmation.value) {
+        confirmation.setCustomValidity((new IntlMessageFormat(messages['password_confirmation.mismatching'] || 'Password confirmation does not match', locale)).format());
+      } else {
+        confirmation.setCustomValidity('');
+      }
+    });
+
     delegate(document, '.custom-emoji', 'mouseover', getEmojiAnimationHandler('data-original'));
     delegate(document, '.custom-emoji', 'mouseout', getEmojiAnimationHandler('data-static'));