scroll-padding-block-start
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.
scroll-padding-block-start 属性定义了滚动口的最优视区——用于在用户视野中放置内容的目标区域——的块首内边距。作者由此得以排除滚动口被其他内容（如固定定位的工具栏或侧边栏）所遮挡的区域，或在目标元素与滚动口的边之间留出更多余地。
尝试一下
scroll-padding-block-start: 0; scroll-padding-block-start: 20px; scroll-padding-block-start: 2em; <section class="default-example" id="default-example"> <div class="scroller" id="example-element"> <div>1</div> <div>2</div> <div>3</div> </div> <div class="info">Scroll »</div> </section> .default-example .info { inline-size: 100%; padding: 0.5em 0; font-size: 90%; writing-mode: vertical-rl; } .scroller { text-align: left; height: 250px; width: 270px; overflow-y: scroll; display: flex; flex-direction: column; box-sizing: border-box; border: 1px solid black; scroll-snap-type: y mandatory; } .scroller > div { flex: 0 0 250px; background-color: rebeccapurple; color: #fff; font-size: 30px; display: flex; align-items: center; justify-content: center; scroll-snap-align: start; } .scroller > div:nth-child(even) { background-color: #fff; color: rebeccapurple; } 语法
css
/* 关键字值 */ scroll-padding-block-start: auto; /* <length> 值 */ scroll-padding-block-start: 10px; scroll-padding-block-start: 1em; scroll-padding-block-start: 10%; /* 全局值 */ scroll-padding-block-start: inherit; scroll-padding-block-start: initial; scroll-padding-block-start: revert; scroll-padding-block-start: revert-layer; scroll-padding-block-start: unset; 取值
<length-percentage>滚动口的块首内边距，为有效的长度或百分比。
auto此内边距由用户代理所决定。此值通常为
0px，但用户代理可检测非零值是否更合理并另行处理。
形式定义
形式语法
scroll-padding-block-start =
auto|
<length-percentage [0,∞]>
<length-percentage> =
<length>|
<percentage>
规范
| Specification |
|---|
| CSS Scroll Snap Module Level 1 # padding-longhands-logical |
