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IT修真院·坑乎 | Java(后端),CSS(前端),JavaScript(前端),PM(产品经理),UI(交互设计),QA(测试),Android(安卓APP),iOS(苹果APP),OP(运维),Python(后端)日常在线问答学习平台

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在做任务十二header部分的返回小图标一直都是用的图片，如何用纯css实现呢？

3

1

CSS图标

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"/>
    <title>护工个人主页</title>
	<link rel="stylesheet" href="base.css">
    <link rel="stylesheet" href="task12-1.css">
</head>
<body>
    <header>
        <a href="task12-2.html"><</a>
        <span>个人主页</span> 
    </header>
    <main>
        <div class="background">
            <div><img src="../task5/images/head.png"></div>
            <p>高素雅 51岁<br>
            <img src="../task5/images/icon-1.png" class="dingwei">
            <span>北京·通州·报纸林</span>
            </p>
        </div>
        <p>专业技能</p><hr>
        <div class="list">
            <p><span class="red">☆</span><span class="left-text-first">住家</span><span class="red">☆</span><span>不含餐</span></p><hr>
            <p><span class="left-text">从业年限</span>0~3</p><hr>
            <p><span class="left-text">工作时间</span>全天</p><hr>
            <p><span class="left-text">服务价格</span><span class="red">25元/小时</span></p><hr>
            <div class="last">
                <div class="myself">
                    <span>自我介绍</span>
                </div>
                <div class="oneself">
                    <span>可以洗衣、做饭、照顾老人。在护工方面有5年的经验，经验丰富</span>
                </div>
            </div><hr>
        </div>
    </main>
    <footer>
        <button class="btn-left">留言</button>
        <button class="btn-right">电话联系</button>
    </footer>
</body>
</html>
a {
    color: #ffffff;
    text-decoration: none; }
  
  html {
    font-size: 625%; }
  
  body {
    margin: 0.4rem 0 0.5rem;
    padding: 0;
    font-size: .18rem; }
  
  header {
    position: fixed;
    top: 0;
    text-align: center;
    line-height: .40rem;
    width: 100%;
    color: #ffffff;
    background: #5fc0cd; }
    header a {
      position: absolute;
      left: 0;
      padding: 0 .15rem; }
  
  main {
    margin: .40rem 0 .50rem 0; }
    main .background {
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: flex-start;
      height: 2rem;
      background: url(../task5/images/bg.png) no-repeat;
      background-size: cover; }
      main .background div {
        width: .80rem;
        height: .80rem;
        padding: 0 .30rem; }
      main .background .dingwei {
        position: relative;
        top: .08rem;
        transform: scale(0.6); }
      main .background span {
        font-size: .12rem; }
      main .background img {
        max-width: 100%;
        max-height: 100%; }
    main > p {
      margin-left: .18rem;
      padding-left: .18rem;
      border-left: 2px solid #5fc0cd; }
    main .list {
      padding: 0 .18rem; }
      main .list .red {
        color: #e26163;
        font-weight: 500; }
      main .list .left-text-first {
        color: black;
        padding-right: .20rem;
        margin-right: .20rem;
        border-right: 1px #999999 solid; }
      main .list .left-text {
        color: #999999;
        width: 1.12rem;
        padding: 0 .20rem;
        margin-right: .20rem;
        border-right: 1px #999999 solid;
        white-space: nowrap; }
      main .list .last {
        display: flex;
        align-items: center; }
        main .list .last .myself {
          color: #999999;
          position: absolute;
          width: 1.12rem;
          border-right: 1px #999999 solid;
          text-align: center;
          white-space: nowrap; }
        main .list .last .oneself {
          margin-left: 1.35rem; }
  
  footer {
    position: fixed;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-around;
    height: .50rem;
    width: 100%;
    background: #ffffff; }
    footer .btn-left {
      padding: 0;
      outline: none;
      border: 1px solid #5fc0cd;
      border-radius: .1rem;
      width: 48%;
      height: .40rem;
      font-size: .18rem;
      color: #5fc0cd;
      background: #ffffff; }
    footer .btn-right {
      padding: 0;
      outline: none;
      border: 1px solid #5fc0cd;
      border-radius: .1rem;
      width: 48%;
      height: .40rem;
      font-size: .18rem;
      color: #ffffff;
      background: #5fc0cd; }

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任务七雪碧图调好位置之后无法调节大小

2

1

雪碧图

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

.k{
    background: url(../img/task7-2.11.png) no-repeat;
    background-size: 20vw 5vw;
    display: inline-block;

}
.k1{
    height: 5vw;
    width: 5vw;
    background-position: 0 0;
}
.k2{
    height: 5vw;
    width: 5vw;
    background-position: -5vw 0;
}
.k3{
    height: 5vw;
    width: 5vw;
    background-position: -10vw 0;
}
.k4{
    height: 5vw;
    width: 5vw;
    background-position: -15vw 0;
}

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使用LESS编码时，less应该如何来写，是开头直接编译好，还是像CSS一样。

0

1

Less

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

CSS：
@color:red;
@colora:#b3b3b3;
@colorb:#e5e5e5;
@background:#fff;
@backgrounda:#5fc0cd;
.top{
  display: flex;
  justify-content: space-between;
  align-items: center;
  background:#5fc0cd;
}
.button1{
  outline: none;
  cursor: pointer;
  border: 1px solid #55a8b3;
  color: #fff;
  background: #55a8b3;
  font-size: 28px;
  border-radius: 10%;
}
.button2{
  outline: none;
  cursor: pointer;
  border: 1px solid #fff;
  color: #55a8b3;
  background: #fff;
  font-size: 28px;
  margin-left: -.5rem;
  border-radius: 10%;
}
.footer{
  height: 23rem;
  background:#fff;
}

html{
  font-size: 62.5%;
}
body{
  margin: 0;
  padding: 0;
}
select{
  margin: 0;
  padding: 0;
}
.nav1{
  .top
}
.nav2{
  .button1;
}
.nav3{
  .button2;
  margin:1rem -.5rem;
}
.nav4{
  padding-right: 2rem;
}
main header{
  height: 4rem;
  border-bottom: 1px solid gainsboro;
}
select{
  width: 32.5%;
  border: 0;
  text-align-last: center;  //可以使下拉菜单，文本居中。
  height: 3.5rem;
  outline: none;
  border-right: 1px solid @colora;
  color:@colorb;
  font-size: 2.8rem;
}
.main1{
  .footer;
  padding-left: 1rem;
  margin: 1.5rem 0 .5rem 0;
  border-bottom: 1px solid gainsboro;
  font-size: 2.8vw;
  .main2{
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
  }
  .main3{
    display: flex;
    align-items: center;
    padding-left: 3rem;
  }
  .main4{
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    padding-top: 2rem;
    padding-right: 2rem;
    img{
      padding-top: 1rem;
      width: 2.8vw;
    }
  }
  .main5{
    .main3;
    color:@color;
  }
}
@media screen and (max-width: 900px){
  .main1{
    height: 20rem;
  }
}
@media screen and (max-width: 800px) {
  .main1{
    height: 16rem;
  }
}
footer{
  display: flex;
  justify-content: space-around;
  height: 6.5rem;
  background: #f8fafb;
  .footer1{
    margin-top: 1rem;
    text-align: center;
    color: #5fc0cd;
  }
  .footer2{
    margin-top: 1rem;
    text-align: center;
    color: gainsboro;
  }
}

该问题已被官方收录

设置a标签宽高

2

1

行内元素

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

  <div class="lastgame">
            <span>上次游戏：捉鬼猜词版</span>
            <div class="greater"></div>
        </div>

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在使用css模拟轮播图的时候如何实现点击效果与animation效果共存？

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

.loop-wrap {
    position: relative;
    width: 100%;
  
    overflow: hidden;
    .loop-images-container {
        
        width: 300vw;
        /* 横向排列 3张图片 宽度应为主容器3倍 */
        font-size: 0;
        transform: translate(0, 0);
        /* 初始位置位移 */
        animation: loop 10s linear infinite;
        .loop-image {
            width: 100vw;
            
        }
    }
    .focus-container {
        @include flex-center;
        position: absolute;
        left: 0;
        right: 0;
        bottom: 5%;
            li {
                float: left;
                width: .1rem;
                height: .1rem;
                border-radius: 50%;
                margin: 0 .05rem;
                border: 1px solid #fff;
            }
        
    }
}

@keyframes loop {
    0% {
        transform: translate(0, 0);
    }
    30% {
        transform: translate(0, 0);
    }
    /* 停留1500ms */
    35% {
        transform: translate(-33.3%, 0);
    }
    /* 切换500ms 位移-20% */
    60% {
        transform: translate(-33.3%, 0);
    }
    65% {
        transform: translate(-66.6%, 0);
    }
    95% {
        transform: translate(-66.6%, 0);
    }
    100% {
        transform: translate(0, 0);
    }
    /* 复位到第一张图片 */
}

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雪碧图和文字放在同一个元素，文字换行显示

1

1

雪碧图布局

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<!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>详情</title>
    <style pyte="txet/css">
html { 
    font-size:312.5%; 
} 
body { 
    margin:0 ;
    font-size: initial;  
}
header {
    position: sticky;
    top:0;
    height: .88rem;
    background-color: #5FC0CD;
    line-height: .88rem;
    text-align: center;
    word-spacing:-.16rem;
    z-index: 1;
}
.guzhu{
    width:1.44rem;
    height: .7rem;
    border-radius:.15rem;
    border: none;
    background-color:#55A8B3;
    outline: none; 
    font-size: .34rem;
    color:#FFFFFF;
}
.hugong{
    width:1.44rem;
    height: 0.7rem;
    border-radius: .15rem;
    border: none;
    background-color:#FFFFFF;
    font-size: .34rem;
    font-size: 0.34rem;
    outline: none; 
    color:#55A8B3;
}
.top-right{
    float: right;
    width: .42rem;
    height: .42rem;
    margin: .22rem .3rem 0 -.5rem;
    background:url(task7-css6.png) no-repeat 0 0;

}
.box{
    display:flex;
    align-items: center;
    justify-content: center;
    height: 0.8rem;
    background-color:#FFFFFF;
}

/* 下拉框 */
.dropdown {
    flex: 1;
    position: relative;
    display: inline-block;
    border-top:0.01rem solid #e1e5e7;
    border-bottom: 0.01rem solid #e1e5e7;
    line-height:0.8rem;
    text-align: center;
    font-size:0.28rem;
    color:#999999;
}
.sjx{
    float: right;
    border-width: 0.1rem;
    border-style: solid;
    border-color: #AFBAC0 transparent transparent transparent;
    margin: 0.36rem 0.12rem 0 0;
}
ul,li{
    margin: 0;
    padding:0;
    list-style: none;
}

/* 下拉菜单 */
.dropdown-content {
    display: none;
    position: absolute;
    width: 100%;
    background-color: #f9f9f9;
}
.dropdown:hover .dropdown-content {
    display: block;
}

/* 下拉项点击颜色 */
li.li:hover{
    background-color: #5FC0CD;
}
.main-box{
    display: flex;
    align-items: center;
    height: 1.8rem;
    border-bottom: .001rem solid #E1E5E7;
    background: #FFFFFF;
}
.content-box{
    width: 100%;
    height: 1.2rem;
    border: .01rem solid red;
    line-height: 1.2rem;
}
.date{
    height: .3rem;
    padding-left: .4rem;
    margin: 0 0 0 .3rem;
    background: url(task7-css6.png) no-repeat 0 -.6rem;
    font-size:.24rem;
    /* 字符间距 */
    letter-spacing: .03rem;
    color: #999999;
}

    </style>
</head>
<body>
    <header>
        <button type="button" class="guzhu">找雇主</button>
        <button type="button" class="hugong">找护工</button>
        <a class="top-right" href="www.xxxxx.com"></a>  
    </header>
    <main>
        <div class="box">
            <div class="dropdown">
                <span>所在地
                    <span class="sjx"></span>
                </span>
                <ul class="dropdown-content">
                    <li class="li">北京</li>
                    <li>上海</li>
                    <li>苏州</li>
                </ul>
            </div>
            <div class="dropdown">
                <span>食宿
                    <span class="sjx"></span>
                </span>
                <ul class="dropdown-content">
                    <li>一日一餐</li>
                    <li>一日两餐</li>
                    <li>一日三餐</li>
                </ul>
            </div>
            <div class="dropdown">
                <span>病人情况
                    <span class="sjx"></span>
                </span>
                <ul class="dropdown-content">
                    <li>能自理</li>
                    <li>不能自理</li>
                    <li>手术后</li>
                </ul>
            </div>
        </div>
        <ul>
            <li class="main-box">
                <ul class="content-box">
                    <li class="date">服务日期</li>

                </ul>
            </li>
        </ul>
    </main>

</body>
</html>

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火狐浏览器下white-space:nowrap和浮动与谷歌浏览器表现不一致

1

1

兼容性

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <style type="text/css">
        button {
            width: 300px;
            height: 300px;
            white-space: nowrap
        }
        .bo1 {
            background-color: red;
        }
        .box2 {
            width: 30px;
            height: 10px;
            background-color: blue;
            float: right;
        }
    </style>
</head>
<body>
    <button>
        我希望右边的蓝色快在我的右上方
        <span class="box2"></span>
        </buton>
</body>

</html>

该问题已被官方收录

bootstrap布局，内外边距出现问题，布局崩溃

0

1

bottstrap 边距

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<div class="container">
<div class="row">
<div class="col">
</div>
</div>
</div>

该问题已被官方收录

使用ul模拟下拉列表的时候，下拉列表背景出现透明

0

1

布局下拉菜单

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

/* CSS 代码 */
       .header {
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            height: 80px; }

        .header .select {
            width: 100%;
            height: 35px;
            background-color: #fff;
            border-bottom: 1px solid #eee; }

        .select:after {
            content: '';
            display: block;
            clear: both; }

        .select .adress,
        .select .eat,
        .select .condition {
            position: relative;
            float: left;
            width: 33.3%;
            font-size: 14px;
            line-height: 35px;
            margin: 0 auto;
            text-align: center; }

        .select .arrow {
            position: absolute;
            top: 15px;
            right: 5px;
            width: 10px;
            height: 8px;
            background: url(./img/task6.png) no-repeat -130px 0;
            -webkit-background-size: 250px;
            background-size: 250px; }

        .select .adlist,
        .select .eatlist,
        .select .conlist {
            height: 0;
            overflow: hidden;
            transition: all 0.5s ease; }

        .select .adlist li,
        .select .eatlist li,
        .select .conlist li {
            width: 100%;
            background-color: #fafafa;
            text-align: center; }

        .select .split {
            position: absolute;
            top: 0;
            right: 0;
            width: 1px;
            height: 35px;
            background: url(./img/task6.png) no-repeat -370px 50%;
            -webkit-background-size: 400px 35px;
            background-size: 400px 35px; }

        .select .adress:hover .adlist,
        .select .eat:hover .eatlist,
        .select .condition:hover .conlist {
            height: 180px; }

        .main {
            width: 100%;}

        .wrapper {
            width: 100%;
            position: absolute;
            top: 35px; }

        .list {
            width: 100%; }

        .list .item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            font-size: 14px;
            border-bottom: 1px solid #ccc; }

        .item .info {
            width: 100%; }

        .item .info .date,
        .item .info .time,
        .item .info .local {
            position: relative;
            margin-top: 10px;
            margin-bottom: 10px;
            padding-left: 35px;
            width: 70%;
            color: #999;
            white-space: nowrap;
            text-overflow: ellipsis;
            overflow: hidden; }

        .item .info .time {
            font-size: 12px;
            color: #000; }

        .item .price {
            position: relative;
            color: #e63b0e;
            margin-right: 25px;
            white-space: nowrap; }

        .item .date:before {
            position: absolute;
            top: 3px;
            left: 15px;
            content: '';
            display: block;
            width: 14px;
            height: 13px;
            background: url(./img/task6.png) no-repeat;
            -webkit-background-size: 230px;
            background-size: 230px; }

        .item .local:before {
            position: absolute;
            top: 3px;
            left: 15px;
            content: '';
            display: block;
            width: 14px;
            height: 13px;
            background: url(./img/task6.png) no-repeat -62px 0;
            -webkit-background-size: 230px;
            background-size: 230px; }

        .item .price:after {
            position: absolute;
            top: 3px;
            right: -15px;
            content: '';
            display: block;
            width: 10px;
            height: 10px;
            border: 2px solid #5fc0cd;
            border-left: 2px solid rgba(95, 192, 205, 0);
            border-bottom: 2px solid rgba(95, 192, 205, 0);
            transform: rotateZ(45deg); }

<!-- html 代码 -->
 <header class="header">
        <div class="select">
            <ul>
                <li class="adress">
                    <p>所在地</p>
                    <div class="arrow"></div>
                    <ul class="adlist">
                        <li>定位</li>
                        <li>龙华区</li>
                        <li>龙岗区</li>
                        <li>宝安区</li>
                        <li>福田区</li>
                    </ul>
                    <div class="split"></div>
                </li>
                <li class="eat">
                    <p>食宿</p>
                    <div class="arrow"></div>
                    <ul class="eatlist">
                        <li>需要</li>
                        <li>不需要</li>
                    </ul>
                    <div class="split"></div>
                </li>
                <li class="condition">
                    <p>病人情况</p>
                    <div class="arrow"></div>
                    <ul class="conlist">
                        <li>健康</li>
                        <li>良好</li>
                        <li>一般</li>
                    </ul>
                </li>
            </ul>
        </div>
    </header>
    <main class="main">
        <div class="wrapper">
            <ul class="list">
                <li class="item">
                    <div class="info">
                        <p class="date">服务日期</p>
                        <p class="time">2015-7-5 至 2015-7-12</p>
                        <p class="local">北京·通州·果园</p>
                    </div>
                    <div class="price"><p>25元/小时</p></div>
                </li>
                <li class="item">
                    <div class="info">
                        <p class="date">服务日期</p>
                        <p class="time">2015-7-5 至 2015-7-12</p>
                        <p class="local">北京·通州·果园</p>
                    </div>
                    <div class="price"><p>25元/小时</p></div>
                </li>
            </ul>
        </div>
    </main>

该问题已被官方收录

什么是文档流，什么是脱离文档流

1

1

css概念

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<style>
        .box{
            float:left;
            width:200px;
            height:200px;
            background:#000;
        }
        .box{
            position:absolute;
            top:0;
            left:0;
            width:200px;
            height:200px;
            background:yellow;
        }
    </style>
</head>
<body>
<div class="box1"></div>
<div class="box"></div>

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