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HomeWeb Front-endHTML TutorialCSS设置行内元素和块级元素的水平居中、垂直居中_html/css_WEB-ITnose

CSS设置行内元素的水平居中

  1. div{text-align:center} /*DIV内的行内元素均会水平居中*/ 

 

CSS设置行内元素的垂直居中

  1. div{height:30px; line-height:30px} /*DIV内的行内元素均会垂直居中*/ 

 

PS:当然,如果既要水平居中又要垂直居中,那么综合一下

  1. div{text-align:center; height:30px; line-height:30px} 

 

CSS设置块级元素的水平居中

  1. div p{margin:0 auto; width:500px} /*块级元素p一定要设置宽度,
  2. 才能相当于DIV父容器水平居中*/ 

 

CSS设置块级元素的垂直居中

  1. div{width:500px} /*DIV父容器设置宽度*/ 
  2. div p{margin:0 aut0; height:30px; line-height:30px} /*块级元素p也可以加个宽度,
  3. 以达到相对于DIV父容器的水平居中效果*/ 

说明:在以后的实际项目中,块级元素的垂直居中布局方式可能会碰到比这个更复杂,请关注以后的相关文章!

 

什么叫行内元素?

常见的span、a、lable、strong、b等html标签都是行内元素

默认情况下,行内元素均无法设置宽度、高度、上下方向margin的外边距等

当然,这不是绝对的,通过CSS可以让任何行内元素变成块级元素!比如:

  1. span{display:block} /*span这时设置成了块级元素*/ 

 

什么叫块级元素?

常见的div、p、li、h1、h2、h3、h4等html标签都是块级元素

当然,这也不是绝对的,通过CSS可以让任何块级元素变成行内元素!比如:

  1. h1{display:inline} /*h1这时设置成了行内元素*/ 

 

总结:

前端初学者理解行内元素和块级元素的概念很重要,这对切图div+css布局很有帮助!如有疑问,欢迎底下留言!

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