Update deep-equal.ts

1 files changed, 14 insertions, 3 deletions

diff --git a/packages/frontend/src/utility/deep-equal.ts b/packages/frontend/src/utility/deep-equal.ts
index c64d82c6cc..2859641dc7 100644
--- a/packages/frontend/src/utility/deep-equal.ts
+++ b/packages/frontend/src/utility/deep-equal.ts
@@ -3,24 +3,35 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-export function deepEqual(a: any, b: any): boolean {
+type JsonLike = string | number | boolean | null | undefined | JsonLike[] | { [key: string]: JsonLike } | Map<string, JsonLike>;
+
+export function deepEqual(a: JsonLike, b: JsonLike): boolean {
 	if (a === b) return true;
+	if (typeof a !== typeof b) return false;
 
 	if (a === null) return b === null;
 
+	if (a === undefined) return b === undefined;
+
 	if (Array.isArray(a) && Array.isArray(b)) {
 		if (a.length !== b.length) return false;
 		for (let i = 0; i < a.length; i++) {
 			if (!deepEqual(a[i], b[i])) return false;
 		}
 		return true;
+	} else if (a instanceof Map && b instanceof Map) {
+		if (a.size !== b.size) return false;
+		for (const [k, v] of a) {
+			if (!deepEqual(v, b.get(k))) return false;
+		}
+		return true;
 	} else if (((typeof a) === 'object') && ((typeof b) === 'object')) {
 		const aks = Object.keys(a);
-		const bks = Object.keys(b);
+		const bks = Object.keys(b as { [key: string]: JsonLike });
 		if (aks.length !== bks.length) return false;
 		for (let i = 0; i < aks.length; i++) {
 			const k = aks[i];
-			if (!deepEqual(a[k], b[k])) return false;
+			if (!deepEqual(a[k], (b as { [key: string]: JsonLike })[k])) return false;
 		}
 		return true;
 	}