diff --git a/static/common.js b/static/common.js
index 7c98781..64c272c 100644
--- a/static/common.js
+++ b/static/common.js
@@ -3,6 +3,12 @@
 (function (global) {
   "use strict";
 
+  // 布尔属性：用属性赋值而非 setAttribute（setAttribute("checked","false") 仍会勾选）
+  const BOOL_PROPS = new Set([
+    "checked", "disabled", "readonly", "selected", "hidden", "multiple", "open",
+    "autofocus", "required", "async", "defer", "controls", "autoplay", "loop", "muted",
+  ]);
+
   function el(tag, attrs, ...children) {
     const node = document.createElement(tag);
     if (attrs) {
@@ -11,7 +17,8 @@
         else if (k === "dataset") Object.assign(node.dataset, v);
         else if (k.startsWith("on") && typeof v === "function")
           node.addEventListener(k.slice(2).toLowerCase(), v);
-        else if (v !== null && v !== undefined) node.setAttribute(k, v);
+        else if (BOOL_PROPS.has(k)) node[k] = !!v;
+        else if (v !== null && v !== undefined && v !== false) node.setAttribute(k, v);
       }
     }
     for (const c of children) {