From 8458b6b7a4016af328b4c6f404be6e2c0c846b5e Mon Sep 17 00:00:00 2001
From: eight <eight04@gmail.com>
Date: Sat, 9 Mar 2019 14:49:02 +0800
Subject: [PATCH] Fix: don't argue for mutations generated by other extensions

---
 content/apply.js | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/content/apply.js b/content/apply.js
index e91e3f97..cd30cd1c 100644
--- a/content/apply.js
+++ b/content/apply.js
@@ -19,6 +19,7 @@ const APPLY = (() => {
     onChange: () => {
       if (styleInjector.outOfOrder()) {
         styleInjector.sort();
+        return true;
       }
     }
   });
@@ -414,21 +415,21 @@ const APPLY = (() => {
   }
 
   function createDocRootObserver({onChange}) {
-    let lastCalledTime = performance.now();
-    let continuousCalledCount = 0;
+    let digest = 0;
+    let lastCalledTime = NaN;
     let observing = false;
     const observer = new MutationObserver(() => {
-      const now = performance.now();
-      if (now - lastCalledTime < 1000) {
-        if (continuousCalledCount >= 5) {
+      if (digest) {
+        if (performance.now() - lastCalledTime > 1000) {
+          digest = 0;
+        } else if (digest > 5) {
           throw new Error('The page keeps generating mutations. Skip the event.');
         }
-        continuousCalledCount++;
-      } else {
-        continuousCalledCount = 0;
       }
-      lastCalledTime = now;
-      onChange();
+      if (onChange()) {
+        digest++;
+        lastCalledTime = performance.now();
+      }
     });
     return {start, stop, evade};