Home >Web Front-end >HTML Tutorial >div ul li Basic questions for beginners. There are pictures and codes. Experts can take a look. Thank you._html/css_WEB-ITnose
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.header-nav {margin: 0 auto; margin:3px 3px ; border: thin solid red; }
.header-nav ul { width:99%; margin:3px 3px ; border: thin solid black; }
.header-nav li { float: left; width:13%; list-style-type: none;
margin:3px 3px ; border: thin solid orange; }
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如果li float了之后,会影响兄弟,父级元素。所以必须使用clear来清除。
demo here
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> .header-nav {margin: 0 auto; margin:3px 3px ; border: thin solid red; } .header-nav ul { width:99%; margin:3px 3px ; border: thin solid black; } .header-nav li { float: left; width:13%; list-style-type: none;margin:3px 3px ; border: thin solid orange; } .clearfix:after{visibility:hidden;display:block;font-size:0;content:" ";clear:both;height:0;} .clearfix{display:inline-block;} html[xmlns] .clearfix{display:block;} * html .clearfix{height:1%;} </style></head><body><div class="header-nav"> <ul class="clearfix"> <li><a href="">首页</a></li> <li><a href="" target="_blank">品牌中心</a></li> <li><a href="" target="_blank">专家团队</a></li> </ul></div></body></html>
如果li float了之后,会影响兄弟,父级元素。所以必须使用clear来清除。
demo here
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> .header-nav {margin: 0 auto; margin:3px 3px ; border: thin solid red; } .header-nav ul { width:99%; margin:3px 3px ; border: thin solid black; } .header-nav li { float: left; width:13%; list-style-type: none;margin:3px 3px ; border: thin solid orange; } .clearfix:after{visibility:hidden;display:block;font-size:0;content:" ";clear:both;height:0;} .clearfix{display:inline-block;} html[xmlns] .clearfix{display:block;} * html .clearfix{height:1%;} </style></head><body><div class="header-nav"> <ul class="clearfix"> <li><a href="">首页</a></li> <li><a href="" target="_blank">品牌中心</a></li> <li><a href="" target="_blank">专家团队</a></li> </ul></div></body></html>
而且 我用了,没效果啊,还是没变化
有效果 ,但那个ul还是超出了div 它不是在div里面吗,怎么超出去了
如果li float了之后,会影响兄弟,父级元素。所以必须使用clear来清除。
demo here
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> *{margin:0;padding:0;} .header-nav {margin: 0 auto; margin:3px 3px ; border: thin solid red; } .header-nav ul { width:99%; margin:3px 3px ; border: thin solid black; } .header-nav li { float: left; width:13%; list-style-type: none;margin:3px 3px ; border: thin solid orange; } .clearfix:after{visibility:hidden;display:block;font-size:0;content:" ";clear:both;height:0;} .clearfix{display:inline-block;} html[xmlns] .clearfix{display:block;} * html .clearfix{height:1%;} </style></head><body><div class="header-nav"> <ul class="clearfix"> <li><a href="">首页</a></li> <li><a href="" target="_blank">品牌中心</a></li> <li><a href="" target="_blank">专家团队</a></li> </ul></div></body></html>
*{margin:0;padding:0;}