From 6e38ae47352af3f55649912765986df063cc5c00 Mon Sep 17 00:00:00 2001
From: Yanzhen Yu <yanzhen@smartx.com>
Date: Sun, 29 Mar 2020 21:14:45 +0800
Subject: [PATCH] avoid style sheet rules index overflow

---
 src/replay/index.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/replay/index.ts b/src/replay/index.ts
index f2b15de5..bf25b535 100644
--- a/src/replay/index.ts
+++ b/src/replay/index.ts
@@ -297,6 +297,7 @@ export class Replayer {
       );
     }
     this.missingNodeRetryMap = {};
+    console.log('rebuild map');
     mirror.map = rebuild(event.data.node, this.iframe.contentDocument!)[1];
     const styleEl = document.createElement('style');
     const { documentElement, head } = this.iframe.contentDocument!;
@@ -625,7 +626,11 @@ export class Replayer {
 
         if (d.adds) {
           d.adds.forEach(({ rule, index }) => {
-            styleSheet.insertRule(rule, index);
+            const _index =
+              index === undefined
+                ? undefined
+                : Math.min(index, styleSheet.rules.length);
+            styleSheet.insertRule(rule, _index);
           });
         }