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选择器的练习-4-25作业
李男_江苏_412288
Original
745 people have browsed it

实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*标签选择器*/
        ul li {
            list-style: none;
            /*display实现块级、行内、行内块级元素转化。*/
            /*块级元素主要写结构。*/
            /*内联级主要写内容的。*/
            display: inline-block;
            width: 40px;
            height: 40px;
            /*行高和宽高一致,可实现文本的垂直居中*/
            line-height: 40px;
            /*text-align可让文本水平居中*/
            text-align: center;
            background-color: aqua;
            margin-left: 5px;
            /*变成圆形就是宽高的50%*/
            border-radius: 50%;
            /*四个数据分别为:水平、垂直、渐变、颜色*/
            box-shadow:3px 2px 2px gray;
        }
        /*id选择器用#*/
        #blue{
            background-color: blue;
        }
        /*类选择器可设置多个*/
        .green{
            background-color: green;
        }
        /*属性选择器,选属性*/
        li[id]{
            border: 3px red solid;
        }
        /*群组选择器,中间一个逗号隔开*/
        #blue,.green{
            border: 2px black dashed;
        }
        /*相邻选择器用+li,也可以用*,*/
        #blue+li{
            border: 5px solid blueviolet;
        }
        /*同级兄弟选择器*/
        #blue~*{
            background-color: gray;
        }
    </style>
</head>
<body>
        <ul>
            <li>地球</li>
            <li id="blue">火星</li>
            <li>水星</li>
            <li class="green">金星</li>
            <li>***</li>
            <li>月亮</li>
            <li class="green">土星</li>
            <li>五星</li>
        </ul>
</body>

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实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*!*标签选择器*!*/
        ul li {
            list-style: none;
            /*display实现块级、行内、行内块级元素转化。*/
            /*块级元素主要写结构。*/
            /*内联级主要写内容的。*/
            display: inline-block;
            width: 40px;
            height: 40px;
            /*行高和宽高一致,可实现文本的垂直居中*/
            line-height: 40px;
            /*text-align可让文本水平居中*/
            text-align: center;
            background-color: aqua;
            margin-left: 5px;
            /*变成圆形就是宽高的50%*/
            border-radius: 50%;
            /*四个数据分别为:水平、垂直、渐变、颜色*/
            box-shadow:3px 2px 2px gray;
        }
        /*伪类:子元素选择器,切记,ul 后边要加空格。*/
        ul :first-child{
            background-color: gray;
        }
        ul :last-child{
            background-color:blueviolet;
        }
        ul :nth-child(5){
            background-color:blue;
        }
        ul :nth-last-child(3){
            background-color: green;
        }
        /*伪类:类型选择器,指第几个这种类型的样式设置成什么样*/
        ul li:first-of-type{
            background-color: antiquewhite;
        }
        ul li:last-of-type{
            background-color:greenyellow;

        }
        ul li:nth-of-type(4){
            background-color:brown;
        }
        /*第一个DIV类型的里的第二个*/
        div:first-of-type :nth-child(2){
            background-color: brown;
        }
        /*第二个子元素P类型的设置成啥样*/
        div p:nth-of-type(2){
            background-color: greenyellow;
        }
        /*表单样式*/
        /*enabled指有效框设置效果*/
        form :enabled{
            background-color:lightpink;
        }
        form :checked+label{
            color: green;
        }
        /*当输入错误时被激活*/
        form :invalid{
            color:red;
        }
        /*获取焦点的效果:*/
        form :focus{
            background-color: green;
        }
        /*鼠标悬停效果*/
        button:hover{
            color: greenyellow;
        }
    </style>
</head>
<body>
        <ul>
            <li>地球</li>
            <li>火星</li>
            <li>水星</li>
            <li>金星</li>
            <li>***</li>
            <li>月亮</li>
            <li>土星</li>
            <li>五星</li>
        </ul>
        <div>
            <p>大狗</p>
            <li>二狗</li>
            <p>三狗</p>
        </div>
           <div>
               <p>四狗</p>
               <li>五狗</li>
           </div>
        <hr>
        <h1>用户登录</h1>
        <form>
            <p>
            <label for="email"></label>
            <input type="email" id="email" name="" value="">邮箱
            </p>
            <p>
            <label for="password"></label>
            <input type="password" id="password" name="" value="">密码
            </p>
            <p>

              <input type="radio" id="week" checked>
                <label for="week">保存一周</label>
                <input type="radio" id="month">
                <label for="month">保存一月</label>
            </p>
            <p>
                <button>提交</button>
            </p>
        </form>
</body>
</html>

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实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>加油</title>
    <style>.box {
        width: 300px;
        height: 2000px;
        border: 5px dashed black;

        /*设置背景*/
        /*background-color: deeppink;*/
        /*background-image: url("xunguang-7.jpg");*/
        /*是否重复*/
        /*background-repeat: no-repeat;*/
        /*背景定位*/
        /*background-position: left center;*/
        background-size: 100px 100px;
        /*背景不滚动*/
        /*background-attachment:fixed;*/
        /*合起来写*/
        background:black url("xunguang-7.jpg") 50px 100px fixed no-repeat;</style>
</head>
<body>
  <div class="box"></div>
</body>
</html>

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Correction status:Uncorrected

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