Blogger Information
Blog 23
fans 1
comment 0
visits 17066
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
演示Css选择器优先级、写一个盒模型简单案例2019年4月24日22时00分课后作业
布衣大汉的博客
Original
539 people have browsed it

1、写一个案例, 演示css中的选择器优先级(忽略js)


实例

<!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>演示css中的选择器优先级(不含JS)(selector)</title>
    <style>
        /* 标签选择器 */
        h3 {
            background-color:silver;
            color: red;
        }

        /* class类选择器 */
        .bg-lightblue {
            background-color: lightblue;
            color:gold;
        }

        /* id选择器 */
        #bg-yellow {
            background-color: yellow;
            color: blueviolet;
        }

    </style>
</head>
<body>

<h3>我是一号,我是只设置了标签选择器的样子!</h3>

<h3 class="bg-lightblue">我是二号,我是设置了标签选择器和class选择器的样子!</h3>

<h3 class="bg-lightblue" id="bg-yellow">我是三号,我是设置了标签选择器、class选择器和id选择器的样子!< id</h3>

<h3 class="bg-lightblue" id="bg-yellow" style="background-color: blue;color: white">我是四号,我除了设置标签选择器、class选择器和id选择器,还在h标签内部设置了属性!</h3>

</body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

2、写一个盒模型的简单案例,体会padding/border的简写规则


实例

<!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>世间万物皆系于盒子之上(box)</title>

    <style>
        .box1 {
            width: 200px;
            height: 200px;
            background-color: lightblue;

            /* 可以简写:按顺时针 */
            padding: 50px 40px 30px 20px;

            /* 上边框 */
            border-top-width: 10px;
            border-top-style: solid;
            border-top-color: red;

            /* 右边框 */
            border-right-width: 10px;
            border-right-style: dashed;
            border-right-color: green;

            /* 下边框 */
            border-bottom-width: 10px;
            border-bottom-style: dotted;
            border-bottom-color: blue;

            /* 左边框 */
            border-left-width: 10px;
            border-left-style: double;
            border-left-color: black;

            /* 以上样式与可以简写 */
            border-top: 10px solid red;
            border-right: 10px dashed yellow;
            border-bottom: 10px dotted blue;
            border-left: 10px double black;

            /* 如何每个方向的边框宽度,样式与颜色是一样的,还可以进一步简写 */
            border: 10px solid slateblue;
        }

        /*box2盒子是box1的内容,会继承box1的宽度*/
        .box2 {
            /*height: inherit;*/
            background-color: salmon;
        }

    </style>
</head>
<body>
<h3 style="color: palevioletred">写一个盒模型的简单案例,体会padding/border的简写规则</h3>

<div class="box1">
    <p>里面可以看到汉字吗?</p>
    <div class="box2">
        <img src="http://www.pptbz.com/pptpic/UploadFiles_6909/201406/2014063021281300.gif" alt="我会显示提示吗?" style="width: 200px">
    </div>

</div>

</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