CSS - scroll-padding-塊起始

CSS scroll-padding-block-start 指定元素在塊維度上的滾動填充的起始邊緣的偏移量。

可能的值

<length-percentage> − 有效的長度或百分比值，定義從視口對應邊緣向內偏移。

<auto> − 由使用者代理確定的從視口對應邊緣向內偏移。

應用於

所有滾動容器。

語法

scroll-padding-block-start =  auto | <length-percentage>

CSS scroll-padding-block-start - 長度值

以下示例演示瞭如何使用scroll-padding-block-start 屬性來設定 div 元素在塊維度上的滾動填充的起始邊緣的偏移量，使用長度值 (30px)。

<html>
<head>
<style>
   #container {
      width: 50%;
      aspect-ratio: 3/1;
      padding: 40px 0;
      border: solid black 2px;
      overflow-x: hidden;
      overflow-y: scroll;
      scroll-snap-type: y mandatory;
      scroll-padding-block-start: 30px;
   }

   .boxA {
      background-color: rgb(234, 234, 128);
      width: 85%;
      aspect-ratio: 3/1;
   }

   .boxB {
      background-color: lightgreen;
      width: 70%;
      aspect-ratio: 4/1;
   }

   .boxA, .boxB {
      margin: 2px;
      scroll-snap-align: start none;
   }
</style>
</head>
<body>
   <h3>CSS scroll-padding-block-start property.</h3>
   <p>scroll-padding-block-start property sets the offset for the start edge of the scrollport of an element in the block dimension.</p>

   <div id="container">
      <div class="boxA"></div>
      <div class="boxB"></div>
      <div class="boxA"></div>
      <div class="boxB"></div>
      <div class="boxA"></div>
   </div>
</body>
</html>

CSS scroll-padding-block-start - 百分比值

以下示例演示瞭如何使用scroll-padding-block-start 屬性來設定 div 元素在塊維度上的滾動填充的起始邊緣的偏移量，使用百分比值 (60%)。

<html>
<head>
<style>
   #container {
      width: 50%;
      aspect-ratio: 3/1;
      padding: 40px 0;
      border: solid black 2px;
      overflow-x: hidden;
      overflow-y: scroll;
      scroll-snap-type: y mandatory;
      scroll-padding-block-start: 60%;
   }

   .boxA {
      background-color: rgb(234, 234, 128);
      width: 85%;
      aspect-ratio: 3/1;
   }

   .boxB {
      background-color: lightgreen;
      width: 70%;
      aspect-ratio: 4/1;
   }

   .boxA, .boxB {
      margin: 2px;
      scroll-snap-align: start none;
   }
</style>
</head>
<body>
   <h3>CSS scroll-padding-block-start property.</h3>
   <p>scroll-padding-block-start property sets the offset for the start edge of the scrollport of an element in the block dimension.</p>

   <div id="container">
      <div class="boxA"></div>
      <div class="boxB"></div>
      <div class="boxA"></div>
      <div class="boxB"></div>
      <div class="boxA"></div>
   </div>
</body>
</html>

CSS scroll-padding-block-start - auto 值

以下示例演示瞭如何使用scroll-padding-block-start 屬性來設定 div 元素在塊維度上的滾動填充的起始邊緣的偏移量，使用關鍵字值 (auto)。

<html>
<head>
<style>
   #container {
      width: 50%;
      aspect-ratio: 3/1;
      padding: 40px 0;
      border: solid black 2px;
      overflow-x: hidden;
      overflow-y: scroll;
      scroll-snap-type: y mandatory;
      scroll-padding-block-start: auto;
   }

   .boxA {
      background-color: rgb(234, 234, 128);
      width: 85%;
      aspect-ratio: 3/1;
   }

   .boxB {
      background-color: lightgreen;
      width: 70%;
      aspect-ratio: 4/1;
   }

   .boxA, .boxB {
      margin: 2px;
      scroll-snap-align: start none;
   }
</style>
</head>
<body>
   <h3>CSS scroll-padding-block-start property.</h3>
   <p>scroll-padding-block-start property sets the offset for the start edge of the scrollport of an element in the block dimension.</p>

   <div id="container">
      <div class="boxA"></div>
      <div class="boxB"></div>
      <div class="boxA"></div>
      <div class="boxB"></div>
      <div class="boxA"></div>
   </div>
</body>
</html>

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