概念
當用戶手動導航或者 CSSOM scrolling API 觸發滾動操作時，CSS 屬性 scroll-behavior 為一個滾動框指定滾動行為，其他任何的滾動，例如那些由於用戶行為而產生的滾動，不受這個屬性的影響。在根元素中指定這個屬性時，它反而適用於視窗。
語法
/* Keyword values */ scroll-behavior: auto; // 滾動條立即滾動 scroll-behavior: smooth; // 窗口平穩滾動 /* Global values */ scroll-behavior: inherit; scroll-behavior: initial; scroll-behavior: unset;
兼容性
例子
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>錨點平滑跳轉</title> <style> *{ margin: 0; padding: 0; } html{ scroll-behavior: smooth; } nav{ width: 50%; height: 50px; text-align: center; position: fixed; left: 50%; transform: translateX(-50%); top: 0; background: green; } nav a{ display: inline-block; line-height: 50px; color: #FFF; text-decoration: none; padding: 0 30px; } .box{ width: 100%; text-align: center; font-size: 30px; color: #FFF; } #box1{ background: #d00; } #box2{ background: #42a4ff; } #box3{ background: #008080; } </style> </head> <body> <nav> <a href="#box1">box1</a> <a href="#box2">box2</a> <a href="#box3">box3</a> </nav> <div id="box1" class=" box">box1</div> <div id="box2" class=" box">box2</div> <div id="box3" class=" box">box3</div> <script> onload = function(){ const _Height = document.documentElement.clientHeight; const Box = document.getElementsByClassName('box'); for (var i=0;i<Box.length;i++){ Box[i].style.height = _Height + 'px' Box[i].style.lineHeight = _Height + 'px' } } </script> </body> </html>