From 4db8a73235719fdce6b8df8eb316b9efab3688b7 Mon Sep 17 00:00:00 2001
From: ntwigs <oscar.cv.nordquist@gmail.com>
Date: Mon, 28 Nov 2022 12:18:22 +0100
Subject: [PATCH] feat: make sure extension hasn't been added before injecting

---
 src/snow/index.ts | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/snow/index.ts b/src/snow/index.ts
index 39fa0cc..46d9c13 100644
--- a/src/snow/index.ts
+++ b/src/snow/index.ts
@@ -1,2 +1,14 @@
 import { Canvas } from './main/canvas'
-new Canvas()
+import { LET_IT_SNOW_CLASS } from './main/canvas/selectors'
+
+const hasCanvas = () => {
+  const canvas = document.querySelector(`.${LET_IT_SNOW_CLASS}`)
+  return !!canvas
+}
+
+const snow = () => {
+  if (hasCanvas()) return
+  new Canvas()
+}
+
+snow()