feature:

调整Header，平滑滚动

components/Header.js

@@ -12,9 +12,14 @@ import Typed from 'typed.js'
 export default function Header () {
   const [typed, changeType] = useState()
   useEffect(() => {
-    if (!typed) {
+    if (!typed && window && document.getElementById('typed')) {
       changeType(new Typed('#typed', {
-        stringsElement: '#typed-strings', typeSpeed: 200, showCursor: false
+        strings: ['Hi，我是一个程序员', 'Hi，我是一个打工人', 'Hi，我是一个干饭人', '欢迎来到我的博客🎉'],
+        typeSpeed: 200,
+        backSpeed: 100,
+        backDelay: 400,
+        showCursor: true,
+        smartBackspace: true
       }))
     }
   })
@@ -23,8 +28,20 @@ export default function Header () {
   }
 
   const { theme } = useGlobal()
-  // 监听滚动自动分页加载
+  // 监听滚动
+  let windowTop = 0
   const scrollTrigger = useCallback(throttle(() => {
+    if (window.scrollY > windowTop & window.scrollY < window.innerHeight) {
+      scrollToCenter()
+    }
+    if (window.scrollY < windowTop & window.scrollY < window.innerHeight) {
+      window.scroll({ top: 0, behavior: 'smooth' })
+    }
+    windowTop = window.scrollY
+    updateTopNav()
+  }, 500))
+
+  const updateTopNav = () => {
     if (theme !== 'dark') {
       const stickyNavElement = document.getElementById('sticky-nav')
       if (window.scrollY < window.innerHeight) {
@@ -33,27 +50,26 @@ export default function Header () {
         stickyNavElement.classList.remove('dark')
       }
     }
-  }, 500))
+  }
 
   // 监听滚动
   useEffect(() => {
-    scrollTrigger()
+    updateTopNav()
     window.addEventListener('scroll', scrollTrigger)
     return () => {
       window.removeEventListener('scroll', scrollTrigger)
     }
   })
 
-  return <div className='h-screen w-full'>
-      <div className='absolute z-10 flex h-screen items-center justify-center w-full'>
-          <div id="typed-strings">
-        <h2 className='text-xs text-white font-serif'>唐风集里，收卷波澜。</h2>
-        </div>
-        <div id="typed" className='text-4xl md:text-7xl text-center text-white font-serif'></div>
+  return <header className='h-screen w-full'>
+
+    <div className='absolute z-10 flex h-screen items-center justify-center w-full text-4xl md:text-7xl text-white'>
+      <div id="typed" className=' text-center font-serif'></div>
       <div onClick={scrollToCenter} className='cursor-pointer w-full text-center text-2xl animate-bounce absolute bottom-10 text-white'><FontAwesomeIcon icon={faArrowDown} /></div>
     </div>
-    <div className='bg-black bg-cover bg-center h-screen md:-mt-14'
-        style={{ backgroundImage: 'linear-gradient(rgba(0, 0, 0, 0.5), rgba(0,0,0,0.4), rgba(0, 0, 0, 0.5) ),url("https://pic2.zhimg.com/v2-9dfb9bd28656a13d7d57793c853dfb52_r.jpg")' }}>
+
+    <div className='bg-black bg-cover bg-center h-screen md:-mt-14  animate__fadeInRight animate_fadeIn'
+        style={{ backgroundImage: 'linear-gradient(rgba(0, 0, 0, 0.5), rgba(0,0,0,0.4), rgba(0, 0, 0, 0.5) ),url("./bg_image.jpg")' }}>
     </div>
-</div>
+</header>
 }