From 3c1799dcfd73ed788c29d7183b5edc9831a9c7ec Mon Sep 17 00:00:00 2001
From: Aria Minaei <aria.minaei@gmail.com>
Date: Tue, 15 Mar 2022 14:55:19 +0100
Subject: [PATCH] Document mousePositionD

---
 theatre/studio/src/utils/mousePositionD.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/theatre/studio/src/utils/mousePositionD.ts b/theatre/studio/src/utils/mousePositionD.ts
index d9c4ee5..b50f214 100644
--- a/theatre/studio/src/utils/mousePositionD.ts
+++ b/theatre/studio/src/utils/mousePositionD.ts
@@ -1,5 +1,8 @@
 import {prism} from '@theatre/dataverse'
 
+/**
+ * A derivation that holds the current mouse position.
+ */
 const mousePositionD = prism(() => {
   const [pos, setPos] = prism.state<MouseEvent | null>('pos', null)
   prism.effect(