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<html> <head> <style> .parent { width: 100%; height: 100px; background: cyan; display: flex; justify-content: center; align-items: center; } .son { width: 20%; height: 20%; background: pink; } </style> </head> <body> <div class='parent'> <div class='son'></div> </div> </body> </html>
<html> <head> <style> .parent { position: relative; width: 200px; height: 200px; background: pink; } .son { position: absolute; left: 50%; top: 50%; margin-left: -25px; margin-top: -25px; width: 50px; height: 50px; background: yellow; } </style> </head> <body> <div class='parent'> <div class='son'></div> </div> </body> </html>
<html> <head> <style> .parent { position: relative; width: 200px; height: 200px; background: cyan; } .son { position: absolute; left: 0; top: 0; bottom: 0; right: 0; margin: auto; width: 10%; height: 10%; background: yellow; } </style> </head> <body> <div class='parent'> <div class='son'></div> </div> </body> </html>
<html> <head> <style> .parent { display: grid; } .son { jusitify-self: center; align-self: center; } </style> </head> <body> <div class='parent'> <div class='son'></div> </div> </body> </html>
<html> <head> <style> .parent { display: table-cell; vertical-align: middle; text-align: center; width: 100vw; height: 90vh; background-color: yellowgreen; } .son { display: inline-block; width: 200px; height: 200px; background-color: Indigo; } </style> </head> <body> <div class='parent'> <div class='son'></div> </div> </body> </html>
<html> <head> <style> .parent { height: 100vh; width: 100vw; text-align: center; background: #c0c0c0; } .parent:before { content: "\200B"; display: inline-block; height: 100%; vertical-align: middle; } .son { display: inline-block; vertical-align: middle; width: 200px; height: 200px; padding: 10px 15px; background: #f5f5f5; } </style> </head> <body> <div class="parent"> <div class="son"></div> </div> </body> </html>
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适用场景:父子宽高都可未知(比较推荐这种方式,简单,而且目前兼容性也不错。)
适用场景:父元素宽高已知未知都行,但是首先得有宽高。其次子元素的宽高必须已知,因为需要设置子元素的负margin. (也可以将负margin设置成translate来做位移实现)
适用场景:父子元素宽高都未知的情况(该方式不需要明确知道子元素宽高,子元素宽高可用百分比,对于子元素宽高不确定需要居中的情况比较适合。)
适用场景:父子元素宽高未知,兼容性不大好
适用场景: 父元素大小已知(非百分比高度),子元素大小未知,但子元素须为行内块元素,较好的兼容性
适用场景:父子宽高都可未知,子元素需为行内块元素(这种方式其实就是使用伪元素的高度为100%,子元素和伪元素都设置 vertical-align: middle实现垂直居中的效果)
The text was updated successfully, but these errors were encountered: