CSS - inset-block-end 属性

CSS inset-block-end 属性设置元素的末端与其父容器在块方向上的距离。它取决于元素的书写模式、方向和文本方向。为了使该属性生效，必须定义position 属性。

语法

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

属性值

值	描述
auto	根据元素的内容或其他布局因素确定元素的大小。默认值。
length	使用长度单位（例如 px、em、rem 等）设置元素末端的距离。可以使用负值。
percentage	使用相对于其父容器的百分比值设置元素末端的距离。
initial	将属性设置为其默认值。
inherit	从父元素继承该属性。

CSS Inset Block End 属性示例

以下示例使用不同的值解释了 inset-block-end 属性。

使用 Auto 值的 Inset Block End 属性

为了让浏览器根据其他 CSS 属性和应用于元素的布局规则确定块末端边缘的适当偏移量，我们使用 auto 值。以下示例显示了这一点。

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-end: auto;
      }
   </style>
</head>

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

</html>

使用长度值的 Inset Block End 属性

要设置包含块底部边缘的距离，我们可以使用长度单位（例如 px、em、rem 等）指定距离。以下示例显示了这一点。

示例

<!DOCTYPE html>
<html>

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

      .inner {
         position: absolute;
         background-color: lightgreen;
         inset-block-start: 0;
      }

      .inner-box1 {
         inset-block-end: 30px;
      }

      .inner-box2 {
         inset-block-end: 6em;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block-end property
   </h2>
   <h4>
      inset-block-end: 30px (The distance of the 
      end of the green area is 30px from the parent 
      container)
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block-end property. Observe 
         how the distance of this green area is changed 
         from block-end.
      </div>
   </div>
   <h4>
      inset-block-end: 6em (The distance of the end 
      of the green area is 6em from the parent 
      container)
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block-end property. Observe 
         how the distance of this green area is changed 
         from block-end.
      </div>
   </div>
</body>

</html>

使用百分比值的 Inset Block End 属性

要设置包含块底部边缘的距离，我们可以使用百分比值（例如 10%）指定距离。以下示例显示了这一点。

示例

<!DOCTYPE html>
<html>

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

      .inner {
         position: absolute;
         background-color: lightgreen;
         inset-block-start: 0;
      }

      .inner-box1 {
         inset-block-end: 20%;
      }

      .inner-box2 {
         inset-block-end: 60%;
      }
   </style>
</head>

<body>
   <h2>
      CSS inset-block-end property
   </h2>
   <h4>
      inset-block-end: 20% (The distance of the 
      end of the green area is 20% of the 
      container.)
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block-end property. Observe 
         how the distance of this green area is changed 
         from block-end.
      </div>
   </div>
   <h4>
      inset-block-end: 60% (The distance of the end 
      of the green area is 60% of the container.)
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block-end property. Observe 
         how the distance of this green area is changed 
         from block-end.
      </div>
   </div>
</body>

</html>

带有书写模式的 Inset Block End 属性

inset-block-end 属性可以与 writing-mode 属性结合使用，后者确定文本的方向。在水平模式下，它会影响底部距离。在垂直模式下，它会影响右侧或左侧距离。以下示例显示了这一点。

示例

<!DOCTYPE html>
<html>

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

      .inner {
         position: absolute;
         background-color: lightgreen;
         inset-block-start: 0;
         inset-block-end: 50%;
      }

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

      }

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

<body>
   <h2>
      CSS inset-block-end property
   </h2>
   <h4>
      inset-block-end: 50% ; 
      writing mode: horizontal-lr
   </h4>
   <div class="container">
      <div class="inner inner-box1">
         This shows the inset-block-end property. Observe 
         how the distance of this green area is changed 
         from block-end.
      </div>
   </div>
   <h4>
      inset-block-end: 50% ; 
      writing-mode: vertical-lr
   </h4>
   <div class="container">
      <div class="inner inner-box2">
         This shows the inset-block-end property. Observe 
         how the distance of this green area is changed 
         from block-end.
      </div>
   </div>
</body>

</html>

支持的浏览器

属性
inset-block-end	87.0	87.0	63.0	14.1	73.0

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