简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > List of blog posts > 4.24号作业1-css选择器的优先级
Blogger Information
Blog 20
fans 0
comment 0
visits 29380
Special Recommendation
More>
Related recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
4.24号作业1-css选择器的优先级
蜗牛是条鱼
Original
890 people have browsed it

实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>演示css中选择起优先级案例</title>
    <!--第二步：在外部样式表中定义h1的样式，查看选择器的优先级-->
    <style>
        /*从标签开始定义*/
        h1{
            background-color: crimson;
            color: aqua;
        }
        /*开始测试class*/
        .bg{
            background-color: antiquewhite;
        }
        /*测试id选择器*/
        #bg{
            background-color: black;
        }
        /*测试效果可以看出 id>class>标签*/

    </style>
</head>
<body>
<hr>
<!--第一步给h1标签中添加属性-->
<h1 id="bg" class="bg" title="优先级" style="background-color: cornflowerblue">演示css中选择器的优先级</h1>
<!--元素具备的4个属性  id ***号； class  性别； title  姓名  style 个人简介-->
<!--元素中 style 加入，外部样式表失效-->
<!--测试元素优先级得出结论  style>id>class>标签-->
<hr>
  <!--引入js控制元素查看效果-->
<script>
    document.getElementById('bg').style.backgroundColor='red';
</script>
<!--js优先级最高，拥有控制的权限-->
</body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例


Correction status：Uncorrected

Teacher's comments：
Statement of this Website
The copyright of this blog article belongs to the blogger. Please specify the address when reprinting! If there is any infringement or violation of the law, please contact admin@php.cn Report processing!
All comments Speak rationally on civilized internet, please comply with News Comment Service Agreement
0 comments
Author's latest blog post
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！