定义与用法

The <hr> tag inserts a horizontal rule.
<hr>标签可以插入水平线

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在HTML和XHTML中的区别

In HTML the <hr> tag has no end tag.
在HTML中<hr>标签不需要结束标签

In XHTML the <hr> tag must be properly closed.
在XHTML中<hr>标签必须合理的关闭

All "presentation attributes" of the hr element were deprecated in HTML 4.01.
在HTML4.01中所有与hr有关的属性都不再被推荐使用

All "presentation attributes" of the hr element are not supported in XHTML 1.0 Strict DTD.
在XHTML1.0严密型DTD中不支持所有有关hr元素的属性

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实例

代码	输出结果
This is some text <hr /> This is some text	This is some text This is some text

 

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可选属性

DTD indicates in which DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.
下表中的DTD列指明了被支持的DTD属性。S=Strict（精确的），T=Transitional（传统的），F=Frameset（框架）

属性	值	描述	DTD
align	center left right	Specifies the alignment of the horizontal rule. Deprecated. Use styles instead 指定水平线的对齐方向。[不推荐]使用样式做替代	TF
noshade	noshade	When set to true the rule should render in a solid color, when set to false the rule should render in a two-color "groove". Deprecated. Use styles instead 当设置为true水平线将只显示一条色线，而没有当初用两条线衬托出的凹槽效果了。[不推荐]使用样式做替代	TF
size	pixels %	Specifies the thickness (height) of the horizontal rule. Deprecated. Use styles instead 指定水平线的厚度(高度)。不推荐。可用样式来做替代	TF
width	pixels %	Specifies the width of the horizontal rule Deprecated. Use styles instead 指定水平线的宽度[不推荐]可使用样式来做替代	TF

标准属性

id, class, title, style, dir, lang, xml:lang

For a full description, go to Standard Attributes.
查看完整的属性

事件属性

onclick, ondblclick, onmousedown, onmouseup, onmouseover, onmousemove, onmouseout, onkeypress, onkeydown, onkeyup

For a full description, go to Event Attributes.
查看完整的属性

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尝试与演示

Horizontal rule
How to insert a horizontal rule.
如何插入一条水平线

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