优化一下博客的性能

themes/Ying/assets/js/modules/floating-tools.js

@@ -198,16 +198,21 @@ window.initFloatingTools = function() {
         }
 
         if (container) {
-            window.lightboxObserver = new MutationObserver(function(mutations) {
+            var syncLightboxState = function() {
                 var lightbox = document.querySelector('.view-image');
                 if (lightbox) {
                     container.classList.add('hidden');
                 } else {
                     container.classList.remove('hidden');
                 }
+            };
+
+            window.lightboxObserver = new MutationObserver(function() {
+                syncLightboxState();
             });
 
-            window.lightboxObserver.observe(document.body, { childList: true });
+            window.lightboxObserver.observe(document.body, { childList: true, subtree: true });
+            syncLightboxState();
         }
 
     } catch (e) {