[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, 25 insertions, 0 deletions

diff --git a/js/tests/visual/collapse.html b/js/tests/visual/collapse.html
index e13597984..973d3c5ee 100644
--- a/js/tests/visual/collapse.html
+++ b/js/tests/visual/collapse.html
@@ -61,5 +61,30 @@
     <script src="../vendor/jquery.min.js"></script>
     <script src="../../dist/util.js"></script>
     <script src="../../dist/collapse.js"></script>
+    <script>
+      // JavaScript Test
+      $(function () {
+        testCollapseTransitionError()
+      });
+
+      // Should throw an error because carousel is in transition
+      function testCollapseTransitionError() {
+        var err = false
+        $('#collapseOne').on('hidden.bs.collapse', function (e) {
+          $(this).off('hidden.bs.collapse')
+          if (!err) {
+            alert('No error thrown for : testCollapseTransitionError')
+          }
+        })
+
+        try {
+          $('#collapseOne').collapse('hide').collapse('show')
+        }
+        catch (e) {
+          err = true
+          console.error(e.message)
+        }
+      }
+    </script>
   </body>
 </html>