[V4] Throw error when a plugin is in transition (#17823)

* Throw error when a plugin is in transition
* Add unit tests about plugins in transition

1 files changed, 21 insertions, 0 deletions

diff --git a/js/tests/visual/modal.html b/js/tests/visual/modal.html
index fa5bd368aa..69d3923506 100644
--- a/js/tests/visual/modal.html
+++ b/js/tests/visual/modal.html
@@ -188,6 +188,26 @@
         }
       }
 
+      // Should throw an error because modal is in transition
+      function testModalTransitionError() {
+        var err = false
+        // Close #myModal
+        $('#myModal').on('shown.bs.modal', function () {
+          $('#myModal').modal('hide').off('shown.bs.modal')
+          if (!err) {
+            alert('No error thrown for : testModalTransitionError')
+          }
+        })
+
+        try {
+          $('#myModal').modal('show').modal('hide')
+        }
+        catch (e) {
+          err = true
+          console.error(e.message)
+        }
+      }
+
       $(function () {
         $('[data-toggle="popover"]').popover()
         $('[data-toggle="tooltip"]').tooltip()
@@ -200,6 +220,7 @@
           $('#firefoxModal').on('focus', reportFirefoxTestResult.bind(false))
           $('#ff-bug-input').on('focus', reportFirefoxTestResult.bind(true))
         })
+        testModalTransitionError()
       })
     </script>
   </body>