二级菜单，部分

themes/example/components/DropMenu.js

@@ -0,0 +1,38 @@
+import Link from 'next/link'
+import { useState } from 'react'
+
+export const DropMenu = ({ link }) => {
+  const [show, changeShow] = useState(false)
+  const hasSubMenu = link?.subMenus?.length > 0
+
+  return <li className='cursor-pointer' onMouseOver={() => changeShow(true)} onMouseOut={() => changeShow(false)} >
+
+        {!hasSubMenu &&
+            <div className="rounded px-2 md:pl-0 md:mr-3 my-4 md:pr-3 text-gray-700 dark:text-gray-200 no-underline md:border-r border-gray-light">
+                <Link href={link?.to} >
+                    {link?.name}
+                    {hasSubMenu && <i className='px-2 fa fa-angle-down'></i>}
+                </Link>
+            </div>
+        }
+
+        {hasSubMenu &&
+            <div className='rounded px-2 md:pl-0 md:mr-3 my-4 md:pr-3 text-gray-700 dark:text-gray-200 no-underline md:border-r border-gray-light'>
+                {link?.name}
+                <i className='px-2 fa fa-angle-down'></i>
+            </div>
+        }
+
+        {/* 子菜单 */}
+        {hasSubMenu && <ul className={`${show ? 'visible opacity-100' : 'invisible opacity-0'} border-gray-100  bg-white  dark:bg-black dark:border-gray-800 transition-all duration-300 z-20 top-12 absolute block drop-shadow-lg `}>
+            {link.subMenus.map(sLink => {
+              return <li key={sLink.id} className='not:last-child:border-b-0 border-b text-gray-700 dark:text-gray-200  hover:bg-gray-50 dark:hover:bg-gray-900 tracking-widest transition-all duration-200  dark:border-gray-800 py-3 pr-6 pl-2'>
+                    <Link href={sLink.to}>
+                        <span className='text-xs font-extralight'>{sLink.title}</span>
+                    </Link>
+                </li>
+            })}
+        </ul>}
+
+    </li>
+}

themes/example/components/Nav.js

@@ -1,6 +1,7 @@
+import BLOG from '@/blog.config'
 import { useGlobal } from '@/lib/global'
-import Link from 'next/link'
 import CONFIG_EXAMPLE from '../config_example'
+import { DropMenu } from './DropMenu'
 
 /**
  * 菜单导航
@@ -8,8 +9,9 @@ import CONFIG_EXAMPLE from '../config_example'
  * @returns
  */
 export const Nav = (props) => {
-  const { customNav } = props
+  const { customNav, customMenu } = props
   const { locale } = useGlobal()
+
   let links = [
     { icon: 'fas fa-search', name: locale.NAV.SEARCH, to: '/search', show: CONFIG_EXAMPLE.MENU_SEARCH },
     { icon: 'fas fa-archive', name: locale.NAV.ARCHIVE, to: '/archive', show: CONFIG_EXAMPLE.MENU_ARCHIVE },
@@ -21,23 +23,22 @@ export const Nav = (props) => {
     links = links.concat(customNav)
   }
 
+  // 如果 开启自定义菜单，则不再使用 Page生成菜单。
+  if (BLOG.CUSTOM_MENU) {
+    links = customMenu
+  }
+
+  if (!links || links.length === 0) {
+    return null
+  }
+
   return (
         <nav className="w-full bg-white md:pt-0 px-6 relative z-20 border-t border-b border-gray-light dark:border-hexo-black-gray dark:bg-black">
             <div className="container mx-auto max-w-4xl md:flex justify-between items-center text-sm md:text-md md:justify-start">
-                <div className="w-full text-center md:text-left flex flex-wrap justify-center items-stretch md:justify-start md:items-start">
-                    {links.map(link => {
-                      if (link.show) {
-                        return link && <Link
-                                href={link.to}
-                                key={link.to}
-                                className="px-2 md:pl-0 md:mr-3 my-4 md:pr-3 text-gray-700 dark:text-gray-200 no-underline md:border-r border-gray-light">
-                                {link.name}
-                            </Link>
-                      } else {
-                        return null
-                      }
-                    })}
-                </div>
+                <ul className="w-full text-center md:text-left flex flex-wrap justify-center items-stretch md:justify-start md:items-start">
+                    {/* {links.map(link => <NormalMenuItem key={link.id} link={link}/>)} */}
+                    {links.map(link => <DropMenu key={link.id} link={link} />)}
+                </ul>
                 <div className="w-full md:w-1/3 text-center md:text-right">
                     {/* <!-- extra links --> */}
                 </div>

themes/example/components/NormalMenuItem.js

@@ -0,0 +1,14 @@
+import Link from 'next/link'
+
+/**
+ * 旧的普通菜单
+ * @param {*} props
+ * @returns
+ */
+export const NormalMenuItem = (props) => {
+  const { link } = props
+  return link?.show && <Link href={link.to} key={link.to}
+        className="px-2 md:pl-0 md:mr-3 my-4 md:pr-3 text-gray-700 dark:text-gray-200 no-underline md:border-r border-gray-light">
+        {link.name}
+    </Link>
+}