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

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

咨询电话 : 010-59478634

全部问题

已收录问题

未收录问题

没有找到答案，去提问>>>

该问题已被官方收录

怎么设置自适应居中的高度。

4

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

html{
    font-size: 312.5%;
}
body{
    margin: 0;
    font-size: initial;
    background-color: #29BDE0;
}
header{
    position: fixed;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 .24rem;
    top: 0;
    left: 0;
    right: 0;
    height: .88rem;
    color: #FFFFFF;
    font-size: .34rem;
    z-index: 1;
}
.key-box{
    display: flex;
    justify-content: center;
    align-items: center;
    width: .4rem;
    height: .4rem;
    border: .02rem solid #FFFFFF;
}
.key{
    padding: .1rem 0;
    width: .3rem;
    height: .02rem;
    border-top: .02rem solid #FFFFFF;
    border-bottom: .02rem solid #FFFFFF;
    background: #FFFFFF content-box;
}
.close{
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: .6rem;
    width: .6rem;
}
.line-left{
    height: .5rem;
    width: .04rem;
    transform: rotate(45deg);
    background-color: #FFFFFF;
}
.line-right{
    position: absolute;
    height: .5rem;
    width: .04rem;
    transform: rotate(-45deg);
    background-color: #FFFFFF;
}
main{
    position: relative;
}
.speak{
    display: flex;
    justify-content: space-between;
    margin-top: .88rem;
    align-items: center;
    height: .82rem;
    background-color: #B9E9F5;
}
.speak::before{
    position: absolute;
    top: .82rem;
    left: .71rem;
    content: "";
    border-top: .28rem solid #B9E9F5;
    border-left: .14rem solid transparent;
    border-right: .14rem solid transparent;
}
.discuss{
    margin-left: .46rem;
    font-size: .26rem;
    color: #464646;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: .02rem;
}
.circular{
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: .17rem;
    height: .52rem;
    width: .52rem;
    border-radius: 50%;
    background-color: #FBB435;
}
.triangle{
    display: inline-block;
    border-left: .26rem solid #FFFFFF;
    border-top: .13rem solid transparent;
    border-bottom: .13rem solid transparent;
}
.click{
    margin-top: .25rem;
    margin-left: .72rem;
    font-size: .24rem;
    letter-spacing: .04rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #FFFFFF;
}
ul{
    margin: 0;
    padding: .43rem .43rem 0 .43rem;
    list-style: none;
}
li{
    margin: 0;
    padding: 0;
    list-style: none;
}
p {
    margin: 0;
}
.first-row{
    display: flex;
    justify-content: space-between;
}
.square{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    border: .05rem solid #FFFFFF;
}
.squaree{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    margin: 0 .71rem;
    
    width: 100%;
    border: .05rem solid #FFFFFF;
}
.civil{
    width: 100%;
    font-size: .3rem;
    color: #565656;
    line-height: 1rem;
    letter-spacing: .04rem;
    white-space: nowrap;
    background-color: #F5C97B;
}
.number{
    width: 100%;
    font-size: .23rem;
    letter-spacing: .02rem;
    white-space: nowrap;
    color: #FFFFFF;
    background-color: #83B09A;

<!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>task7-2</title>
    <link rel="stylesheet" type="text/css" href="../css/task7-2.css">
</head>
<body>
<header>
     <span class="key-box"><a class="key" href="http://www.jnshu.com/task/1/39/detail//#0"></a></span>
     <span>投票</span>
     <div class="close">
         <span class="line-left"></span>
         <span class="line-right"></span>
    </div>
</header>
<main>
<div class="speak">
    <span class="discuss">发言讨论结束，大家请投票</span>
    <span class="circular">
        <a class="triangle" href="http://www.jnshu.com/task/1/39/detail//#0"></a>
    </span>
</div>
<p class="click">点击得票数最多人的头像</p>
<ul>
    <li class="first-row">
         <div class="square">
             <p class="civil">水民</p>
             <p class="number">1号</p>
         </div>
         <div class="squaree">
             <p>水民</p>
             <p>2号</p>
         </div>
         <div class="square">
             <p>警察</p>
             <p>3号</p>
         </div>
    </li>
</ul>
</main>
</body>
</html>

该问题已被官方收录

为什么display：inline-block水平的下拉菜单会先上升后下降

0

1

布局

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

 <style>
        ul {
            display: inline-block;
            background: red;
            margin: 0;
            max-height: 0;
            overflow: hidden;
            transition: all 5s;
        }

        div {
            background: black;
            color: #fff;
        }
    </style>
</head>

<body>
    <button>点击触发</button>
    <div class="drop-contaienr">
        <ul>
            <li>下拉列表选项</li>
            <li>下拉列表选项</li>
            <li>下拉列表选项</li>
            <li>下拉列表选项</li>
        </ul>
    </div>
    <script>
        var log = console.log;
        var btn = document.querySelector('button'),
            ul = document.querySelector('ul');
        btn.onclick = function () {

            ul.style['max-height'] = '300px';
        }
    </script>

该问题已被官方收录

图片定位之后下拉显示在背景上面

1

1

定位

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

css

header {
    position: sticky;
    top:0;
    width: 100%;
    height: .88rem;
    background-color: #5FC0CD;
    line-height: .88rem;
    text-align: center;
    word-spacing: -10px;
}
.dwyz2{
    height: 15px;
    width: 15px;
    position: absolute;
    margin: 6px 0 0 15px;
}


html
<li class="ddbox">
            <img class="dwyz2" src="../img/task6-6.png"/>
            <span class="date">服务日期</span>
            <div class="lll">
                <span class="left">2018-6-12至2018-3-22</span>
                <span class="right">25元/小时
<a class="qwe"></a>
</span>
            </div>
            <img class="dwyz" src="../img/task6-5.png"/>
            <span class="location">北京.通州.果园</span>
        </li>
        <li class="ddbox">
            <img class="dwyz2" src="../img/task6-6.png"/>
            <span class="date">服务日期</span>
            <div class="lll">
                <span class="left">2015-7-5至2017-7-12</span>
                <span class="right">25元/小时
<a class="qwe"></a>
</span>
            </div>
            <img class="dwyz" src="../img/task6-5.png"/>
            <span class="location">北京.通州.果园</span>
        </li>

该问题已被官方收录

鼠标悬浮hover

1

1

hover

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

第一种
.box2 {
     visibility: hidden;
 }
 .box1:hover .box2 {
     visibility: visible;
 }
第二种
 .box2 {
     visibility: hidden;
 }
 .box1:hover~ .box2 {
     visibility: visible;
 }

该问题已被官方收录

文字中间的竖线在Chrome调试时显示在正常位置，手机端打开时竖线会向右偏移

0

1

布局

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

.intro1::before {
    content: '';
    position: relative;
    left: 1.35rem;
    padding-left: .02rem;
    padding-bottom: .01rem;
    background: #E1E5E7;
}

.line::before {
    content: '';
    position: relative;
    left: 1.87rem;
    padding-left: .02rem;
    padding-bottom: .01rem;
    background: #E1E5E7;}

该问题已被官方收录

1

1

轮播

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<div class="carousel-item">
  <img src="..." alt="...">
  <div class="carousel-caption d-none d-md-block">
    <h3>...</h3>
    <p>...</p>
  </div>
</div>

该问题已被官方收录

侧边导航栏

0

1

侧边栏

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

body {
    padding: 0;
    margin: 0;
    background: #f0f0f0;
}

@mixin center {
    display: flex;
    align-items: center;
    flex-direction: column;
}

header {
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    height: 3rem;
    background: #29bde0;
    z-index: 1;
    .menu {
        display: block;
        padding: .3rem 0;
        margin: 1rem;
        height: .2rem;
        width: 1.5rem;
        border-top: solid 3px #fff;
        border-bottom: solid 3px #fff;
        .row {
            border: solid 1.5px #fff;
        }
    }
}





main {
    @include center;
    margin-top: 3rem;
    .main-nav {
        display: block;
        position: relative;
        margin: 1.2rem 0;
        width: 86%;
        line-height: 4rem;
        text-align: center;
        border: solid 1px #c9c9c9;
        font-size: 1.3rem;
        color: #9a9a9a;
        background: #fff;
        .arrow {
            position: absolute;
            top: 1.46rem;
            right: 1rem;
            width: 15px;
            height: 15px;
            border-bottom: 3px solid #e7e7e7;
            border-left: 3px solid #e7e7e7;
            transform: rotate(225deg);
        }
    }
    .main-boxes {
        @include center;
        position: relative;
        width: 86%;
        border: solid 1px #c9c9c9;
        background: #fff;
        .main-title {
            width: 100%;
            line-height: 4rem;
            text-align: center;
            border-bottom: solid 1px #fbb435;
            font-size: 1.5rem;
            font-weight: 100;
            color: #fbb435;
        }
        .main-box {
            display: block;
            margin: 1.3rem 0;
            width: 80%;
            line-height: 5.5rem;
            text-align: center;
            font-size: 1.28rem;
            font-weight: 100;
            color: #fff;
            background: #69d1e9;
        }
        .main-font {
            width: 100%;
            text-align: center;
            font-size: 1.08rem;
            color: #787878;
        }
        .triangle {
            position: absolute;
            top: 16.3rem;
            right: .3rem;
            border-left: solid 20px #fbb435;
            border-top: solid 20px transparent;
            border-bottom: solid 20px transparent;
        }
        .circle {
            display: inline-block;
            margin: 1rem .2rem;
            width: .7rem;
            height: .7rem;
            border-radius: 50%;
            background: #f0f0f0;
            &:hover {
                background: #29bde0;
            }
        }
    }
}

ul,
li {
    position: relative;
    display: block;
    list-style: none;
    padding: 0;
    border-bottom: solid 1px #29bde0;
}

.menu-box {
    position: absolute;
    margin: 0;
    width: 45%;
    height: 100%;
    line-height: 3.5rem;
    font-size: 16px;
    color: #29bde0;
    background: #fff;
}

.nav {
    position: relative;
    overflow: hidden;
}

.main-box {
    position: relative;
    
}

input {
    width: 3rem;
    height: 2rem;
    outline: none !important;
    -webkit-appearance: none;
    border-radius: 0;
}

#menu:checked~.main-box {
    margin-left: 45vw;
}

.left {
    width: 1.34rem;
    height: .2rem;
    padding: .3rem 0;
    margin-left: .22rem;
    border: none;
    outline: none;
    border-top: 3px solid #fff;
    border-bottom: 3px solid #fff;
    background: #fff content-box;
}

label {
    display: block;
}

input {
    display: none;
}

.hide-arrow {
    position: absolute;
    top: 1.46rem;
    right: 1rem;
    width: 15px;
    height: 15px;
    border-bottom: 3px solid #e7e7e7;
    border-left: 3px solid #e7e7e7;
    transform: rotate(225deg);
}

该问题已被官方收录

0

1

动画

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<div class="col-md-6 col-lg-4 main-box">
                <div class="main-box-tow">
                    <div class="hide-box">
                        <span class="hide-title">iOS工程师</span>
                        <p class="hind-font">iOS是由苹果公司开发的移动操作系统， iOS和苹果的Mac OS X操作系统一样， 也是以Darwin为基础的， 因此同样属于类Unix的商业操作系统。 国内的iOS开发起步相对较晚， 人才培养机制更是远远跟不上市场发展速度，
                            有限的iOS开发人才成了国内企业必争的资源。 国内的iOS开发起步相对较晚， 人才培养机制更是远远跟不上市场发展速度， 有限的iOS开发人才成了国内企业必争的资源。
                        </p>



.hide-box {
    position: absolute;
    padding: 5rem 12% 2rem 12%;
    text-align: center;
    line-height: 2rem;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    transition: all 2s;
    transform: rotate(0deg);
}

.hide-title {
    display: none;
    text-align: center;
    line-height: 8rem;
}

.hind-font {
    display: none;
    text-align: left;
}

.main-box-tow:hover .hide-box {
    /* display: block;  */
    transform: rotate(360deg);
    color: #fff;
    background: rgba(16, 16, 16, 0.8);
}

.main-box-tow:hover .hide-title {
    display: inline-block;
}

.main-box-tow:hover .hind-font {
    display: inline-block;
}

该问题已被官方收录

select下拉框的默认样式

0

1

下拉菜单

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

 <select>
      <option>Mustard</option>
      <option>Ketchup</option>
      <option>Relish</option>
  </select>

该问题已被官方收录

less.js 不能在 chrome 下运行

0

1

less

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<link rel="stylesheet/less" type="text/css" href="index.less">
<script src="less.min.js" type="text/javascript"></script>

去第页

Copyright ©2015 北京葡萄藤信息技术有限公司 All Rights Reserved | 京ICP备15035574号-1