Merge pull request #17217 from misskey-dev/develop

Release: 2026.3.0

1 files changed, 15 insertions, 0 deletions

diff --git a/packages/frontend/src/utility/element-contains.ts b/packages/frontend/src/utility/element-contains.ts
new file mode 100644
index 0000000000..8389d49278
--- /dev/null
+++ b/packages/frontend/src/utility/element-contains.ts
@@ -0,0 +1,15 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function elementContains(parent: Element | null, child: Element | null, checkSame = true) {
+	if (parent === null || child === null) return false;
+	if (checkSame && parent === child) return true;
+	let node = child.parentNode;
+	while (node) {
+		if (node === parent) return true;
+		node = node.parentNode;
+	}
+	return false;
+}