diff --git a/‎src/lib/dom-api-shady.html‎
Lines changed: 1 addition & 1 deletion b/‎src/lib/dom-api-shady.html‎
Lines changed: 1 addition & 1 deletion
@@ -188,7 +188,7 @@
         // can be cached while an element is inside a fragment. 
         // If this happens and we cache the result, the value can become stale
         // because for perf we avoid processing the subtree of added fragments.
-        if (root || document.contains(node)) {
+        if (root || document.documentElement.contains(node)) {
           node._ownerShadyRoot = root;
         }
       }
Original file line number	Diff line number	Diff line change
`@@ -188,7 +188,7 @@`
`188`	`188`	`// can be cached while an element is inside a fragment.`
`189`	`189`	`// If this happens and we cache the result, the value can become stale`
`190`	`190`	`// because for perf we avoid processing the subtree of added fragments.`
`191`		`- if (root \|\| document.contains(node)) {`
	`191`	`+ if (root \|\| document.documentElement.contains(node)) {`
`192`	`192`	`node._ownerShadyRoot = root;`
`193`	`193`	`}`
`194`	`194`	`}`