From 8b3a8c7e4295aebeb02c2a0f0595ec7212b7595a Mon Sep 17 00:00:00 2001
From: Jorge Acosta <61467132+JLAcostaEC@users.noreply.github.com>
Date: Fri, 26 Jun 2026 14:10:53 -0400
Subject: [PATCH] docs: add missing `WeakMap` requirement

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index d55c5d7..c94b9b4 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ npm install -D tabspot
 pnpm add -D tabspot
 ```
 >[!IMPORTANT]
-> Runtime needs a modern browser with `MutationObserver`, `WeakRef`, and `Element.checkVisibility`.
+> Runtime needs a modern browser with `MutationObserver`, `WeakRef`, `WeakMap`, and `Element.checkVisibility`.
 
 ## Quick start