fix(jqLite): traverse `host` property for DocumentFragment in inheritedData()

If dealing with a document fragment node with a host element, and no parent, use the host
element as the parent. This enables directives within a Shadow DOM or polyfilled Shadow DOM
to lookup parent controllers.

Closes #6637

1 files changed, 6 insertions, 2 deletions

diff --git a/src/jqLite.js b/src/jqLite.js
index ba613f21..738f47a9 100644
--- a/src/jqLite.js
+++ b/src/jqLite.js
@@ -364,11 +364,15 @@ function jqLiteInheritedData(element, name, value) {
   var names = isArray(name) ? name : [name];
 
   while (element.length) {
-
+    var node = element[0];
     for (var i = 0, ii = names.length; i < ii; i++) {
       if ((value = element.data(names[i])) !== undefined) return value;
     }
-    element = element.parent();
+
+    // If dealing with a document fragment node with a host element, and no parent, use the host
+    // element as the parent. This enables directives within a Shadow DOM or polyfilled Shadow DOM
+    // to lookup parent controllers.
+    element = jqLite(node.parentNode || (node.nodeType === 11 && node.host));
   }
 }