diff --git a/assets/resources/scriptlets.js b/assets/resources/scriptlets.js
index 286394cb2..309323e24 100644
--- a/assets/resources/scriptlets.js
+++ b/assets/resources/scriptlets.js
@@ -665,7 +665,10 @@
     if ( selector === '' || selector === '{{2}}' ) {
         selector = `[${tokens.join('],[')}]`;
     }
-    const rmattr = function() {
+    let behavior = '{{3}}';
+    let timer;
+    const rmattr = ( ) => {
+        timer = undefined;
         try {
             const nodes = document.querySelectorAll(selector);
             for ( const node of nodes ) {
@@ -676,10 +679,39 @@
         } catch(ex) {
         }
     };
-    if ( document.readyState === 'loading' ) {
-        window.addEventListener('DOMContentLoaded', rmattr, { once: true });
-    } else {
+    const mutationHandler = mutations => {
+        if ( timer !== undefined ) { return; }
+        let skip = true;
+        for ( let i = 0; i < mutations.length && skip; i++ ) {
+            const { type, addedNodes, removedNodes } = mutations[i];
+            if ( type === 'attributes' ) { skip = false; }
+            for ( let j = 0; j < addedNodes.length && skip; j++ ) {
+                if ( addedNodes[j].nodeType === 1 ) { skip = false; break; }
+            }
+            for ( let j = 0; j < removedNodes.length && skip; j++ ) {
+                if ( removedNodes[j].nodeType === 1 ) { skip = false; break; }
+            }
+        }
+        if ( skip ) { return; }
+        timer = self.requestIdleCallback(rmattr, { timeout: 67 });
+    };
+    const start = ( ) => {
         rmattr();
+        if ( /\bstay\b/.test(behavior) === false ) { return; }
+        const observer = new MutationObserver(mutationHandler);
+        observer.observe(document.documentElement, {
+            attributes: true,
+            attributeFilter: tokens,
+            childList: true,
+            subtree: true,
+        });
+    };
+    if ( document.readyState !== 'complete' && /\bcomplete\b/.test(behavior) ) {
+        document.addEventListener('load', start, { once: true });
+    } else if ( document.readyState === 'loading' ) {
+        document.addEventListener('DOMContentLoaded', start, { once: true });
+    } else {
+        start();
     }
 })();