diff --git a/assets/customize.js b/assets/customize.js
index 3022276..b9a33ee 100644
--- a/assets/customize.js
+++ b/assets/customize.js
@@ -1,33 +1,33 @@
-Array.from(document.getElementsByTagName("audio")).forEach(function (
-  element,
-  index,
-  elements
-) {
-  element.addEventListener("play", function () {
-    var self = this;
-    elements.forEach(function (element) {
-      if (element === self) return;
+const page = document.querySelector(".book-page");
+
+page.addEventListener(
+  "play",
+  (event) => {
+    if (event.target.tagName !== "AUDIO") return;
+    const elements = event.currentTarget.getElementsByTagName("audio");
+    Array.from(elements).forEach(function (element) {
+      if (element === event.target) return;
       element.pause();
       element.currentTime = 0;
     });
-  });
-});
+  },
+  { capture: true }
+);
 
-var trackList = document.querySelector(".track-list");
-if (trackList) {
-  trackList.addEventListener("click", function (event) {
+page.addEventListener(
+  "click",
+  (event) => {
     if (event.target.tagName !== "A") return;
+    if (!event.target.closest(".track-list")) return;
     event.preventDefault();
     event.stopPropagation();
-    var href = event.target.href;
-
-    var player = document.querySelector(".audio-player");
-
+    const href = event.target.href;
+    const player = document.querySelector(".audio-player");
     player.querySelector("figcaption > b").textContent =
       event.target.dataset.caption;
-
-    var audio = player.querySelector("audio");
+    const audio = player.querySelector("audio");
     audio.src = href;
     audio.play();
-  });
-}
+  },
+  { capture: true }
+);
diff --git a/layouts/partials/docs/inject/content-after.html b/layouts/partials/docs/inject/content-after.html
index b7bfcce..c173497 100644
--- a/layouts/partials/docs/inject/content-after.html
+++ b/layouts/partials/docs/inject/content-after.html
@@ -2,5 +2,5 @@
   <hr>
   <p>本文仅供学习所用，严禁转载或商业加工，任何需求请联系译者 (<a href="mailto:nao@sakuras.jp">佐倉 奈緒</a>）</p>
 </article>
-{{ $customize_js := resources.Get "customize.js" | resources.Minify | resources.Fingerprint "sha512" }}
+{{ $customize_js := resources.Get "customize.js" | js.Build | resources.Minify | resources.Fingerprint "sha512" }}
 <script src="{{ $customize_js.Permalink }}" integrity="{{ $customize_js.Data.Integrity }}"></script>
\ No newline at end of file