servo
diff --git a/‎components/constellation/browsingcontext.rs‎
Lines changed: 5 additions & 0 deletions b/‎components/constellation/browsingcontext.rs‎
Lines changed: 5 additions & 0 deletions
@@ -96,6 +96,11 @@ impl BrowsingContext {
         self.instant = entry.instant;
         self.load_data = entry.load_data;
     }
+
+    /// Is this a top-level browsing context?
+    pub fn is_top_level(&self) -> bool {
+        self.id == self.top_level_id
+    }
 }
 
 /// An entry in a browsing context's session history.
Original file line number	Diff line number	Diff line change
`@@ -96,6 +96,11 @@ impl BrowsingContext {`
`96`	`96`	`self.instant = entry.instant;`
`97`	`97`	`self.load_data = entry.load_data;`
`98`	`98`	`}`
	`99`	`+`
	`100`	`+ /// Is this a top-level browsing context?`
	`101`	`+ pub fn is_top_level(&self) -> bool {`
	`102`	`+ self.id == self.top_level_id`
	`103`	`+ }`
`99`	`104`	`}`
`100`	`105`
`101`	`106`	`/// An entry in a browsing context's session history.`