Fix #13105: Add yiiActiveForm validate_only property for skipping form auto-submission

framework/CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 Change Log
 2.0.44 under development
 ------------------------
 
+- Enh #13105: Add yiiActiveForm validate_only property for skipping form auto-submission (ptolomaues)
 - Enh #18967: Use proper attribute names for tabular data in `yii\widgets\ActiveField::addAriaAttributes()` (AnkIF)
 - Bug #18798: Fix `StringHelper::dirname()` when passing string with a trailing slash (perlexed)
 - Enh #18328: Raise warning when trying to register a file after `View::endPage()` has been called (perlexed)

framework/assets/yii.activeForm.js

@@ -218,6 +218,7 @@
                     attributes: attributes,
                     submitting: false,
                     validated: false,
+                    validate_only: false, // validate without auto submitting
                     options: getFormOptions($form)
                 });
 
@@ -754,12 +755,14 @@
                 data.submitting = false;
             } else {
                 data.validated = true;
-                if (data.submitObject) {
-                    applyButtonOptions($form, data.submitObject);
-                }
-                $form.submit();
-                if (data.submitObject) {
-                    restoreButtonOptions($form);
+                if (!data.validate_only) {
+                    if (data.submitObject) {
+                        applyButtonOptions($form, data.submitObject);
+                    }
+                    $form.submit();
+                    if (data.submitObject) {
+                        restoreButtonOptions($form);
+                    }
                 }
             }
         } else {