CSS - border-style 属性

CSS 的 border-style 属性设置元素四个边框的样式。该属性最多可以接受四个值。根据提供的值的数量，边框样式将应用于相应的边框。

语法

border-style: none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset | initial | inherit;

属性值

值	描述
none	指定无边框。默认值。
hidden	与 none 类似，但在表格元素的边框冲突解决中有所不同。
dotted	指定点状边框。
dashed	指定虚线边框。
solid	指定实线边框。
double	指定双线边框。
groove	指定 3D 凹槽边框。效果取决于 border-color 值。
ridge	指定 3D 脊状边框。效果取决于 border-color 值。
inset	指定 3D 内嵌边框。效果取决于 border-color 值。
outset	指定 3D 外凸边框。效果取决于 border-color 值。
initial	将属性设置为默认值。
inherit	从父元素继承该属性。

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CSS 边框样式属性示例

以下示例使用不同的值说明了 border-style 属性。

无边框样式

要使四个边框均不显示任何边框样式，我们使用 none 值。在以下示例中，使用了 none 值。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-none {
         border-style: none;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-none">
         This heading has 'none' border style
      </h1>
      <p class="border-none">
         This border has 'none' border style
      </p>
   </div>
</body>

</html>

透明边框样式

要使边框存在但不可见，我们可以使用 transparent 值。transparent 值创建不可见的边框，而 none 值则创建无边框。以下示例显示了此差异。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .borders {
         padding: 15px;
         margin: 8px;
         text-align: center;
      }

      .border1 {
         border: 8px solid silver;
         border-style: none;
      }

      .border2 {
         border: 8px solid silver;
         border-color: gold;
         border-style: transparent;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <p class="borders border1">
         This border is using none value, 
         so it does not have border
         indicated by the gap in all four directions.
      </p>
      <p class="borders border2">
         This border is using transparent value,
         so it has an invisible border. Since the border
         exist, the border color is applied to it 
         indicated by the gold color.
      </p>
   </div>
</body>

</html>

点状边框样式

要使四个边框均为点状，我们使用 dotted 值。在以下示例中，dotted 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-dotted {
         border-style: dotted;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-dotted">
         This heading has 'dotted' border style
      </h1>
      <p class="border-dotted">
         This border has 'dotted' border style
      </p>
   </div>
</body>

</html>

虚线边框样式

要使四个边框均为虚线，我们使用 dashed 值。在以下示例中，dashed 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-dashed {
         border-style: dashed;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-dashed">
         This heading has 'dashed' border style
      </h1>
      <p class="border-dashed">
         This border has 'dashed' border style
      </p>
   </div>
</body>

</html>

实线边框样式

要使四个边框均为实线，我们使用 solid 值。在以下示例中，solid 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-solid {
         border-style: solid;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-solid">
         This heading has 'solid' border style
      </h1>
      <p class="border-solid">
         This border has 'solid' border style
      </p>
   </div>
</body>

</html>

双线边框样式

要使四个边框均为双线，我们使用 double 值。在以下示例中，double 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-double {
         border-style: double;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-double">
         This heading has 'double' border style
      </h1>
      <p class="border-double">
         This border has 'double' border style
      </p>
   </div>
</body>

</html>

凹槽边框样式

要使四个边框均为凹槽，我们使用 groove 值。在以下示例中，groove 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-groove {
         border-style: groove;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-groove">
         This heading has 'groove' border style
      </h1>
      <p class="border-groove">
         This border has 'groove' border style
      </p>
   </div>
</body>

</html>

脊状边框样式

要使四个边框均为脊状，我们使用 ridge 值。在以下示例中，ridge 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-ridge {
         border-style: ridge;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-ridge">
         This heading has 'ridge' border style
      </h1>
      <p class="border-ridge">
         This border has 'ridge' border style
      </p>
   </div>
</body>

</html>

内嵌边框样式

要使四个边框均为内嵌，我们使用 inset 值。在以下示例中，inset 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-inset {
         border-style: inset;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-inset">
         This heading has 'inset' border style
      </h1>
      <p class="border-inset">
         This border has 'inset' border style
      </p>
   </div>
</body>

</html>

外凸边框样式

要使四个边框均为外凸，我们使用 outset 值。在以下示例中，outset 值与 border-style 属性一起使用。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .border-outset {
         border-style: outset;
         border-color:red;
         border-width:6px;
         text-align: center;
         padding: 15px;
         margin: 8px;
      }

      h1 {
         background-color: lightblue;
      }

      p {
         border: 6px solid red;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h1 class="border-outset">
         This heading has 'outset' border style
      </h1>
      <p class="border-outset">
         This border has 'outset' border style
      </p>
   </div>
</body>

</html>

使用不同样式的边框样式属性

要使边框具有不同的样式，我们可以向 border-style 属性提供不同数量的样式。以下示例显示了如何通过取不同数量的值来实现此目的。

示例

Open Compiler

<!DOCTYPE html>
<html>

<head>
   <style>
      .borders {
         text-align: center;
         padding: 18px;
         margin: 8px;
         border-width: 5px;
         border-color: green;
         background-color: lightblue;
      }

      .border-one {
         border-style: solid;
      }

      .border-two {
         border-style: solid dashed;
      }

      .border-three {
         border-style: solid dashed dotted;
      }

      .border-four {
         border-style: solid dashed dotted double;
      }
   </style>
</head>

<body>
   <h2>
      CSS border-style property
   </h2>
   <div>
      <h3>Single Value:</h3>
      <h2 class="borders border-one">
         This has single border style: 'solid'
         which is applied to all borders.
      </h2>
      <h3>Two Values:</h3>
      <h2 class="borders border-two">
         This has two border styles: 'solid'
         and 'dashed', solid style is applied
         to top and bottom borders, dashed style
         is applied to left and right borders.
      </h2>
      <h3>Three Values:</h3>
      <h2 class="borders border-three">
         This has three border styles: 'solid',
         'dashed' and 'dotted', solid is applied
         to top border, dashed to right and left
         borders and dotted to bottom border.
      </h2>
      <h3>Four Values:</h3>
      <h2 class="borders border-four">
         This has four border styles: 'solid',
         'dashed','dotted' and 'double', solid
         is applied to top border, dashed to 
         right border, dotted to bottom border
         and double to left border.
      </h2>

   </div>
</body>

</html>

支持的浏览器

属性
border-style	1.0	4.0	1.0	1.0	3.5

css_properties_reference.htm

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