CSS中选择器优先级与!important权重使用

时间:2019-12-01 09:37:59   收藏:0   阅读:118
原文:CSS中选择器优先级与!important权重使用

CSS中的选择器优先级与!important权重使用#

标签选择器和.class选择器#

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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>优先级</title> <style> h2{ color: red; /*红色*/ } .box{ color: springgreen; /*绿色*/ } </style> </head> <body> <h2 class="box">微笑是最初的信仰</h2> </body> </html>

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.class选择器和id选择器#

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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>优先级</title> <style> h2{ color: red; /*红色*/ } .box{ color: springgreen; /*绿色*/ } #box{ color:blue; /*蓝色*/ } </style> </head> <body> <h2 class="box" id="box">微笑是最初的信仰</h2> </body> </html>

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!important权重使用#

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color: red !important; /*红色*/
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>!important使用</title> <style> h2{ color: red !important; /*红色*/ } .box{ color: springgreen; /*绿色*/ } #box{ color:blue; /*蓝色*/ } </style> </head> <body> <h2 class="box" id="box">微笑是最初的信仰</h2> </body> </html>

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总结#

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