add throttle

AdguardTeam · Oct 10, 2022 · 3c61def · 3c61def
1 parent a721c37
commit 3c61def
Showing 1 changed file with 25 additions and 1 deletion.
diff --git a/src/scriptlets/trusted-click-element.js b/src/scriptlets/trusted-click-element.js
@@ -62,6 +62,7 @@ export function trustedClickElement(source, selectors, extraMatch = '', delay =
     const log = console.log.bind(console);
 
     const OBSERVER_TIMEOUT = 10000;
+    const THROTTLE_DELAY_MS = 20;
     const COOKIE_MATCH_MARKER = 'cookie:';
     const LOCAL_STORAGE_MATCH_MARKER = 'localStorage:';
     const COMMON_DELIMITER = ',';
@@ -214,8 +215,31 @@ export function trustedClickElement(source, selectors, extraMatch = '', delay =
         }
     };
 
+    const throttle = (cb, ms) => {
+        let wait = false;
+        let savedArgs;
+        const wrapper = (...args) => {
+            if (wait) {
+                savedArgs = args;
+                return;
+            }
+
+            cb(args);
+            wait = true;
+
+            setTimeout(() => {
+                wait = false;
+                if (savedArgs) {
+                    wrapper(savedArgs);
+                    savedArgs = null;
+                }
+            }, ms);
+        };
+        return wrapper;
+    };
+
     // eslint-disable-next-line compat/compat
-    const observer = new MutationObserver(findElements);
+    const observer = new MutationObserver(throttle(findElements, THROTTLE_DELAY_MS));
     observer.observe(document.documentElement, {
         attributes: true,
         childList: true,