3 files changed, 6 insertions, 16 deletions
diff --git a/ext/fg/js/popup-proxy-host.js b/ext/fg/js/popup-proxy-host.js
index 1048f410..fa61aeb4 100644
--- a/ext/fg/js/popup-proxy-host.js
+++ b/ext/fg/js/popup-proxy-host.js
@@ -57,7 +57,7 @@ class PopupProxyHost {
         const popup = new Popup(id, depth, this.frameIdPromise);
         if (parent !== null) {
             popup.parent = parent;
-            parent.children.push(popup);
+            parent.child = popup;
         }
         this.popups[id] = popup;
         return popup;
diff --git a/ext/fg/js/popup-proxy.js b/ext/fg/js/popup-proxy.js
index 112b998e..f6295079 100644
--- a/ext/fg/js/popup-proxy.js
+++ b/ext/fg/js/popup-proxy.js
@@ -24,7 +24,7 @@ class PopupProxy {
         this.id = null;
         this.idPromise = null;
         this.parent = null;
-        this.children = [];
+        this.child = null;
         this.depth = 0;
 
         this.container = null;
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index 61a5e4d0..3bc0b6f8 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -24,7 +24,7 @@ class Popup {
         this.frameIdPromise = frameIdPromise;
         this.frameId = null;
         this.parent = null;
-        this.children = [];
+        this.child = null;
         this.container = document.createElement('iframe');
         this.container.id = 'yomichan-float';
         this.container.addEventListener('mousedown', e => e.stopPropagation());
@@ -212,19 +212,9 @@ class Popup {
     }
 
     hideChildren() {
-        if (this.children.length === 0) {
-            return;
-        }
-
-        const targets = this.children.slice(0);
-        while (targets.length > 0) {
-            const target = targets.shift();
-            if (target.isContainerHidden()) { continue; }
-
-            target.hide();
-            for (const child of target.children) {
-                targets.push(child);
-            }
+        // recursively hides all children
+        if (this.child && !this.child.isContainerHidden()) {
+            this.child.hide();
         }
     }