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浮动布局
分为三个div,另外一个父级包含这三个div,使用float,
注意点:三个div,left --> right ---> center 这种顺序
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style type="text/css"> body { margin: 0; padding: 0; } .left { float: left; width: 300px; height: 100px; background-color: red; } .right { float: right; width: 300px; height: 100px; background-color: blue; } .center { margin: 0px 300px 0px 300px; background-color: black; height: 100px; } </style> </head> <body> <div class="father"> <div class="left">1</div> <div class="right">2</div> <div class="center">3</div> </div> </body> </html>
Flex
设置中间盒子FLex:1,这样的话就可以实现自适应,默认水平排列
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style type="text/css"> .father { display: flex; } .left { width: 300px; height: 100px; background-color: red; } .center { flex:1; height: 100px; background-color: black; } .right { width: 300px; height: 100px; background-color: blue; } </style> </head> <body> <div class="father"> <div class="left"></div> <div class="center"></div> <div class="right"></div> </div> </body> </html>
flex相关知识点,一般会使用到的
1、设置display:flex
2、容器图:
轴:水平main axis和垂直cross axis
3、容器的属性
flex-direction:主轴的方向,row | row-reverse | column | column-reverse;
flex-wrap:换行, nowrap | wrap | wrap-reverse;
flex-flow:flex-direction和flex-wrap简写
justify-content:主轴上的对齐方式, flex-start | flex-end | center | space-between | space-around;
align-items:交叉轴上如何对齐,flex-start | flex-end | center | baseline | stretch;
绝对定位对齐
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style type="text/css"> .one { background-color: red; position: absolute; left: 0; width: 300px; height: 100px; } .two { left: 300px; right: 300px; background-color: blue; position: absolute; height: 100px; } .three { right: 0px; width: 300px; background-color: yellow; position: absolute; height: 100px; } </style> </head> <body> <div class="father"> <div class="one">1</div> <div class="two">1</div> <div class="three">1</div> </div> </body> </html>
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