From 10f48aad66ffc2ea3f12ceb3e6e6a4abfac5c0ce Mon Sep 17 00:00:00 2001
From: borfyqiu <borfyqiu@tencent.com>
Date: Wed, 28 Dec 2022 11:37:17 +0800
Subject: [PATCH] =?UTF-8?q?<doc>:=20=E5=85=A8=E5=B1=80=E6=B0=B4=E5=8D=B0?=
 =?UTF-8?q?=E4=B8=8E=E5=85=B6=E5=AE=83=E9=81=AE=E7=BD=A9=E5=B1=82=E5=86=B2?=
 =?UTF-8?q?=E7=AA=81=20[issue=20129]=20=E5=B0=86MutationObserver=E8=A7=A6?=
 =?UTF-8?q?=E5=8F=91=E4=BA=8B=E4=BB=B6,=E9=81=BF=E5=85=8D=E5=A4=9A?=
 =?UTF-8?q?=E6=AC=A1=E6=89=A7=E8=A1=8Crender=E5=87=BD=E6=95=B0=EF=BC=8C?=
 =?UTF-8?q?=E5=AF=BC=E8=87=B4=E5=A4=9A=E6=AC=A1=E6=B3=A8=E5=86=8CMutationO?=
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Issue #129
Close #129
---
 packages/core/src/index.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index a7d6278..a0c128f 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -243,13 +243,18 @@ export class Watermark {
 
     if (MutationObserver && this.options.monitor) {
       this.mutationObserver = new MutationObserver(mutations => {
+        // 避免多次执行render函数，导致多次注册MutationObserver 从而进入死循环逻辑
+        let lastMoutation;
         mutations.forEach(mutation => {
           if (this._isAgainRender(mutation)) {
-            this.destroy();
-            this._render();
+            lastMoutation = mutation;
             return;
           }
         });
+        if(lastMoutation){
+          this.destroy();
+          this._render();
+        }
       });
       this.mutationObserver.observe(this.container, observeOptions);
       this.shadowRoot && this.mutationObserver.observe(this.shadowRoot, observeOptions);