116 lines
3.8 KiB
Markdown
116 lines
3.8 KiB
Markdown
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---
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title: Border Property
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localeTitle: 边境财产
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---
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## 边境财产
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## CSS边框
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我们个人最喜欢的CSS属性允许您完全自定义HTML元素周围出现的边框。使用HTML,过去不可能在元素周围放置边框,除了表格。与HTML的过时方法相比,CSS Borders可以让您创建清晰,自定义的边框样式,而且工作量很少。
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`border`简写属性在一个声明中设置所有边框属性。 \`\`\`CSS 边框:1px solid#000;
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```
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The properties that can be set, are (in order):
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1. `border-style`
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2. `border-width`
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3. `border-color`
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4. `border-radius`
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It does not matter if one of the values above are missing, for example:
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```
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CSS 边界:纯红色;
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```
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The above code is also valid CSS.
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### Border Styles
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The `border-style` property sets a wide range of different types of borders.
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The various values are:
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- `dotted` - Sets a dotted border.
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- `dashed` - Sets a dashed border.
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- `solid` - Sets a solid border.
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- `double` - Sets a double border.
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- `groove` - Sets a 3D grooved border.
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- `ridge` - Sets a 3D ridged border.
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- `inset` - Sets a 3D inset border.
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- `outset` - Sets a 3D outset border.
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- `none` - Sets no border.
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- `hidden` - Sets a hidden border.
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Based on the property you choose, these styles can be mismatched.
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You can style each side seperately:
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```
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CSS border-top-style:solid; border-left-style:dotted; border-right-style:dashed; border-bottom-style:double;
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```
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Or you can style them all at once:
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```
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CSS 边框式:实心虚线双点;
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```
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As shown, the border property allows you to select different sections of it. [top, bottom, left, right]
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### Border Width
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To alter the thickness of your border use the border-width attribute. You may use key terms or exact values to define the border width. Note: You must
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define a border-style for the border to show up. The width can be set as a specific size (in px, pt, cm, em, etc) or by using one of the three pre-defined
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values: thin, medium, or thick.
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Example:
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```
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CSS
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table { border-width: 7px; border-style: outset; } td { border-width: medium; border-style: outset; } p { border-width: thick; border-style: solid; }
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```
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### Border Color
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Now for the creative aspect of CSS Borders! With the use of the border-color attribute, you will be able to create customized borders to fit the flow and layout
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of your website. Border colors can be any color defined by RGB, hexadecimal, or key terms. Below is an example of each of these types.
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Example:
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```
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CSS
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table { border-color: rgb( 100, 100, 255); border-style: dashed; } td { border-color: #FFBD32; border-style: ridge; } p { border-color: blue; border-style: solid; }
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```
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### Border-Radius
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The `border-radius` property allows the corners of a border to be rounded. This is done by providing a size for
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how much the border is to be rounded. Size can be in px or %.
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```
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CSS border-radius:25px;
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```
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Each corner of `border-radius` can be adjusted. The order is top, bottom, left, right.
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```
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CSS border-radius:15%10px 30%5px;
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```
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### Border: All in One
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While it is nice that CSS allows a web developer to be very specific in creating a customized border, sometimes it is just easier and less of a headache to create a uniform border, all in single line of CSS code.
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Example:
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```
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CSS
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p { border: 20px outset blue; } h4 { border: 5px solid; } h5 { border: dotted; }
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\`\`\`
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### 更多信息:
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* [MDN文档](https://developer.mozilla.org/en-US/docs/Web/CSS/border)
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* [CSS3边界半径](https://guide.freecodecamp.org/css/css3-borders-rounded-corners)
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### 其他边界属性
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* 'border-radius' - 这可以设置边框的半径。
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* 'border-spacing' - 这可以设置文本和边框之间的间距。
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* 'border-image' - 将图像设置为边框。
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浏览器支持:IE6 +
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