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HTML <hr> 元素表示段落级元素之间的主题转换（例如，一个故事中的场景的改变，或一个章节的主题的改变）。在HTML的早期版本中，它是一个水平线。现在它仍能在可视化浏览器中表现为水平线，但目前被定义为语义上的，而不是表现层面上。
要更改 <hr> 与段落之间的间隙或样式，请使用 CSS。
- 内容分类 Flow content.
- 允许的内容无, 是一个 空元素.
- 标签省略必须有开始标签, 不能有结束标签。
- 允许的父元素 所有接受flow content的元素。
- DOM接口
HTMLHRElement
属性
该元素包含全局属性
align- 设置对齐方式. 如果没有值, 默认值为
left。 color- 使用颜色名或十六进制设置颜色。
noshade- 去除阴影。
size- 使用像素设置高度。
width- 使用像素或者百分比设置宽度。
示例
HTML
<p>
This is the first paragraph of text.
This is the first paragraph of text.
This is the first paragraph of text.
This is the first paragraph of text.
</p>
<hr>
<p>
This is the second paragraph of text.
This is the second paragraph of text.
This is the second paragraph of text.
This is the second paragraph of text.
</p>结果
规范
| 规范 | 状态 | 备注 |
|---|---|---|
| HTML Living Standard <hr> |
Living Standard | Definition of the hr element |
| HTML Living Standard | Living Standard | Suggested default rendering of the hr element |
| HTML5 <hr> |
Recommendation | |
| HTML 4.01 Specification <hr> |
Recommendation |
浏览器兼容性
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
hr | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
align | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
color | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
noshade | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
size | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
width | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.
- Deprecated. Not for use in new websites.