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二、HTML 标签的嵌套规则
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html标签的嵌套规则_html/css_WEB-ITnose

Jun 24, 2016 am 11:29 AM

一、HTML 标签包括 块级元素(block)、内嵌元素(inline)   1、块级元素   一般用来搭建网站架构、布局、承载内容……它包括以下这些标签:   address、blockquote、center、dir、div、dl、dt、dd、fieldset、form、h1~h6、hr、isindex、menu、noframes、noscript、ol、p、pre、table、ul   2、内嵌元素   一般用在网站内容之中的某些细节或部位,用以“强调、区分样式、上标、下标、锚点”等等,下面这些标签都属于内嵌元素:   a、abbr、acronym、b、bdo、big、br、cite、code、dfn、em、font、i、img、input、kbd、label、q、s、samp、select、small、span、strike、strong、sub、sup、textarea、tt、u、var

二、HTML 标签的嵌套规则

  1. 块元素可以包含内联元素或某些块元素,但内联元素却不能包含块元素,它只能包含其它的内联元素:   

—— 对    —— 对   

—— 错   2. 块级元素不能放在

里面:   

—— 错   

—— 错   3. 有几个特殊的块级元素只能包含内嵌元素,不能再包含块级元素,这几个特殊的标签是:   h1、h2、h3、h4、h5、h6、p、dt   4. li 内可以包含 div 标签 —— 这一条其实不必单独列出来的,但是网上许多人对此有些疑惑,就在这里略加说明:   li 和 div 标 签都是装载内容的容器,地位平等,没有级别之分(例如:h1、h2 这样森严的等级制度^_^),要知道,li 标签连它的父级 ul 或者是 ol 都 可以容纳的,为什么有人会觉得 li 偏偏容纳不下一个 div 呢?别把 li 看得那么小气嘛,别看 li 长得挺瘦小,其实 li 的胸襟很大 滴……   5. 块级元素与块级元素并列、内嵌元素与内嵌元素并列:   

—— 对   

—— 对   

—— 错
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