From 3b0077dc73772a460684b5ae5807c5bf511bd757 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BA=88=E3=83=BE?=
 <59309934+wh-if@users.noreply.github.com>
Date: Tue, 14 Mar 2023 17:06:25 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E6=B0=B4=E5=8D=B0?=
 =?UTF-8?q?=E9=87=8D=E5=A4=8D=E5=8F=A0=E5=8A=A0=E9=97=AE=E9=A2=98=20(#2622?=
 =?UTF-8?q?)?=
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Co-authored-by: whong <whif@foxmail.com>
---
 src/hooks/web/useWatermark.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/hooks/web/useWatermark.ts b/src/hooks/web/useWatermark.ts
index a42b84b21..5840c149e 100644
--- a/src/hooks/web/useWatermark.ts
+++ b/src/hooks/web/useWatermark.ts
@@ -4,10 +4,15 @@ import { addResizeListener, removeResizeListener } from '/@/utils/event';
 import { isDef } from '/@/utils/is';
 
 const domSymbol = Symbol('watermark-dom');
+const sourceMap = new WeakMap<HTMLElement, {}>();
 
 export function useWatermark(
   appendEl: Ref<HTMLElement | null> = ref(document.body) as Ref<HTMLElement>,
 ) {
+  const appendElRaw = unref(appendEl);
+  if (appendElRaw && sourceMap.has(appendElRaw)) {
+    return sourceMap.get(appendElRaw);
+  }
   const func = useRafThrottle(function () {
     const el = unref(appendEl);
     if (!el) return;
@@ -82,6 +87,7 @@ export function useWatermark(
     const { clientHeight: height, clientWidth: width } = el;
     updateWatermark({ str, width, height });
     el.appendChild(div);
+    sourceMap.set(el, { setWatermark, clear });
     return id;
   };