1 files changed, 23 insertions, 0 deletions
diff --git a/core/misc/jquery.tabbable.shim.js b/core/misc/jquery.tabbable.shim.js
new file mode 100644
index 000000000000..dd95d9bf1bc0
--- /dev/null
+++ b/core/misc/jquery.tabbable.shim.js
@@ -0,0 +1,23 @@
+/**
+* DO NOT EDIT THIS FILE.
+* See the following change record for more information,
+* https://www.drupal.org/node/2815083
+* @preserve
+**/
+
+(function ($, Drupal, _ref) {
+  var isTabbable = _ref.isTabbable;
+  $.extend($.expr[':'], {
+    tabbable: function tabbable(element) {
+      if (element.tagName === 'SUMMARY' || element.tagName === 'DETAILS') {
+        var tabIndex = element.getAttribute('tabIndex');
+
+        if (tabIndex === null || tabIndex < 0) {
+          return false;
+        }
+      }
+
+      return isTabbable(element);
+    }
+  });
+})(jQuery, Drupal, window.tabbable);
+\ No newline at end of file