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元素多个类名，应该采用哪个呢_html/css_WEB-ITnose

WBOY
Release： 2016-06-21 09:45:02
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CSS HTML


  ...
  ...
  ...

  
  上面div有2个类名，
   在CSS中，如果同时存在
   #class1
  {
    font-weight:bold;   ...
  }

  #class2
  {
    font-weight:normal;   ...
  }
   且有2个相同属性时，会匹配哪个属性呢

回复讨论(解决方案)

按定义的先后顺序,也就是class2中的font-weight:normal; 会被应用 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">.a{	background-color:#f00;}.b{	background-color:#ddd;	}</style></head><body><div class="b a">处档大</div></body></html>
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网页中的定义(a)优于外部连接的定义(style.css中的a).元素属性(ele )的定义优于style中的定义

一般一个元素有两个class，两个class都会用上，如果有冲突，采取后面的那个，也就是class2

以后这样的情况  一试便知

一看就知道 用了那个

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元素多个类名，应该采用哪个呢
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