1 files changed, 8 insertions, 0 deletions
diff --git a/src/client/app/common/scripts/contains.ts b/src/client/app/common/scripts/contains.ts
new file mode 100644
index 0000000000..a5071b3f25
--- /dev/null
+++ b/src/client/app/common/scripts/contains.ts
@@ -0,0 +1,8 @@
+export default (parent, child) => {
+	let node = child.parentNode;
+	while (node) {
+		if (node == parent) return true;
+		node = node.parentNode;
+	}
+	return false;
+};