CSS - inset-block 屬性

CSS inset-block 屬性確定元素與其父容器在塊方向上的距離。它取決於元素的書寫模式、方向和文字方向。它是inset-block-start和inset-block-end屬性的簡寫屬性。position屬性必須定義才能使該屬性顯示其效果。

語法

inset-block: auto | length | percentage | initial | inherit;

屬性值

值	描述
auto	它根據元素的內容或其他佈局因素確定元素的大小。預設值。
長度	它使用長度單位（例如 px、em、rem 等）設定元素的距離。可以使用負值。
百分比	它使用相對於其父容器的百分比值設定元素的距離。
initial	它將屬性設定為其預設值。
inherit	它從父元素繼承屬性。

CSS inset-block 屬性示例

以下示例解釋了使用不同值的 inset-block 屬性。

使用 auto 值的 inset-block 屬性

要允許瀏覽器根據其他 CSS 屬性和應用於元素的佈局規則確定塊起始邊或塊結束邊的適當偏移量，我們使用 auto 值。這在以下示例中顯示。

示例

<!DOCTYPE html>
<html>

<head>
   <style>
      .container {
         border: 2px solid;
         height: 200px;
         width: 300px;
         position: relative;
      }

      .inner-box {
         position: absolute;
         background-color: lightgreen;
         inset-block: auto;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block property
   </h2>
   <h4>
      inset-block: auto
   </h4>
   <div class="container">
      <div class="inner-box">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed
         from the block-start and block-end.
      </div>
   </div>
</body>

</html>

使用長度值的 inset-block 屬性

要設定距包含塊邊緣的距離，我們可以使用長度單位（例如 px、em、rem 等）指定距離。最多可以給出兩個值。單個值設定塊起始和塊結束距離。如果給出兩個值，則第一個值設定塊起始距離，第二個值設定塊結束距離。這在以下示例中顯示。

示例

<!DOCTYPE html>
<html>

<head>
   <style>
      .container {
         border: 2px solid;
         height: 200px;
         width: 300px;
         position: relative;
      }

      .inner {
         position: absolute;
         background-color: lightgreen;
      }

      .inner-box1 {
         inset-block: 10px;
      }

      .inner-box2 {
         inset-block: 25px 50px;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block property
   </h2>
   <h4>
      inset-block: 10px (Both block-start 
      and block-end distances are 10px)
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
   <h4>
      inset-block: 25px 50px (block-start 
      distance is 25px and block-end distance
      is 50px)
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed
         from the block-start and block-end.
      </div>
   </div>
</body>

</html>

使用百分比值的 inset-block 屬性

要設定距包含塊邊緣的距離，我們可以使用百分比值（例如 10%）指定距離。最多可以給出兩個值。單個值設定塊起始和塊結束距離。如果給出兩個值，則第一個值設定塊起始距離，第二個值設定塊結束距離。這在以下示例中顯示。

示例

<!DOCTYPE html>
<html>

<head>
   <style>
      .container {
         border: 2px solid;
         height: 200px;
         width: 300px;
         position: relative;
      }

      .inner {
         position: absolute;
         background-color: lightgreen;
      }

      .inner-box1 {
         inset-block: 10%;
      }

      .inner-box2 {
         inset-block: 20% 50%;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block property
   </h2>
   <h4>
      inset-block: 10% (Both block-start 
      and block-end distances are 10% of 
      the container)
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
   <h4>
      inset-block: 20% 50% (block-start distance
      is 20% and block-end distance is 50% of 
      he container)
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
</body>

</html>

使用混合值的 inset-block 屬性

要設定距包含塊邊緣的距離，我們可以使用長度和百分比值的組合（例如 10px 20%）來指定距離。這在以下示例中顯示。

示例

<!DOCTYPE html>
<html>

<head>
   <style>
      .container {
         border: 2px solid;
         height: 200px;
         width: 300px;
         position: relative;
      }

      .inner {
         position: absolute;
         background-color: lightgreen;
      }

      .inner-box1 {
         inset-block: 10% 55px;
      }

      .inner-box2 {
         inset-block: 75px 15%;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block property
   </h2>
   <h4>
      inset-block: 10% 55px (block-start distance 
      is 10% of container and block-end distance 
      is 55px )
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
   <h4>
      inset-block: 75px 15% (block-start distance 
      is 75px and block-end distance is 15% of 
      the container)
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
</body>

</html>

使用書寫模式的 inset-block 屬性

inset-block 屬性可以與 writing-mode 屬性結合使用，該屬性確定文字的方向。在水平模式下，它影響頂部和底部距離；在垂直模式下，它影響左側和右側距離。這在以下示例中顯示。

示例

<!DOCTYPE html>
<html>

<head>
   <style>
      .container {
         border: 2px solid;
         height: 300px;
         width: 300px;
         position: relative;
      }

      .inner {
         position: absolute;
         background-color: lightgreen;
         inset-block: 30px 40px;
      }

      .inner-box1 {
         writing-mode: horizontal-lr;

      }

      .inner-box2 {
         writing-mode: vertical-lr;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block property
   </h2>
   <h4>
      inset-block: 30px 40px ; 
      writing mode: horizontal-lr
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
   <h4>
      inset-block: 30px 40px ; 
      writing-mode: vertical-lr
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block property. Observe 
         how the distance of this green area is changed 
         from the block-start and block-end.
      </div>
   </div>
</body>

</html>

支援的瀏覽器

屬性
inset-block	87.0	87.0	63.0	14.1	73.0

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