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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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option如何居中

1

2

居中表单元素下拉菜单

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

option {
    font-weight: normal;
    display: block;
    white-space: pre;
    min-height: 1.2em;
    padding: 0px 2px 1px;
    text-align:center;
}

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sass里：nth-of-type()的问题

0

2

sass

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

先上代码

html

<div class="first">
<div class="star">☆</div>
<p class="text">住家</p>
<div class="star">☆</div>
<p class="text">不含餐</p>
</div>
<div class="second">
<p class="job">从业年限</p>
<p class="years">0~3年</p>
</div>
<div class="second">
<p class="job">工作时间</p>
<p class="years">全天</p>
</div>
<div class="second">
<p class="job">服务价格</p>
<p class="years">25元/小时</p>
</div>
<div class="second">
<p class="job">自我介绍</p>
<p class="years"> 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。
</p>
</div>
scss

.second {
@extend %text;
margin-left: .6rem;
.job {
@extend %margin;
padding-right: .26rem;
color: nth($list: $color, $n: 3);
border-right: solid .01rem nth($list: $color, $n: 3);
}
.years {
@extend %margin;
padding-left: .1rem;
&:nth-of-type(3) {
color: #e26163;
}
}
}

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为什么没有给两个按钮设置任何属性它们之间会有间隙

3

2

布局

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<button class="button-1">找雇主</button>
        <button class="button-2">找护工</button>

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select下拉菜单样式修改

1

1

下拉菜单表单元素

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<select class="list-ads" name="list-ads">
                <option value="a1" style="font-size: 13px;">所在地</option>
                <option value="a2" style="font-size: 13px;">上海</option>
                <option value="a3" style="font-size: 13px;">广州</option>
                <option value="a4" style="font-size: 13px;">深圳</option>
            </select>

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设置了最大宽度，子元素设置百分比,同时设置了相对视窗定位，会超出我设定的最大宽度

0

1

自适应

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

body {
  margin: 0;
  padding: 0; }

.max-wid {
  max-width: 780px;
  min-width: 320px;
  height: 100vh;
  margin: auto; }

header {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0;
  line-height: 40px;
  font-size: 20px;
  color: #ffffff;
  background: #5fc0cd; }
  header img {
    height: 20px; }

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给小箭头设置旋转后，小箭头浮动在上面的fixed定位的上面

1

1

定位

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

 .arrows {
  width: .2rem;
  height: .2rem;
  border-top: 2px solid #5fc0cd;
  border-right: 2px solid #5fc0cd;
  transform: rotate(45deg);
}

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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;
  }
}

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怎样使边框颜色渐变

3

1

渐变

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<div class="head-of-form">
    <div>
        <div class="nav-head">
            <span>所在地</span>
            <div class="icon"></div>
        </div>
        <div class="drop-down-content">广州</div>
        <div class="drop-down-content">深圳</div>
        <div class="drop-down-content">珠海</div>
    </div>
    <div>
        <div class="nav-head">
            <span>食宿</span>
            <div class="icon"></div>
        </div>
        <div class="drop-down-content">最便宜</div>
        <div class="drop-down-content">一般般</div>
        <div class="drop-down-content">最昂贵</div>
    </div>
    <div>
        <div class="nav-head">
            <span>病人情况</span>
            <div class="icon"></div>
        </div>
        <div class="drop-down-content">最帅</div>
        <div class="drop-down-content">最美</div>
        <div class="drop-down-content">最可爱</div>
    </div>
</div>

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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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如何用固定定位fixed来实现任务十二选项框，fixer和absolute的区别

2

1

定位

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

.footer{
     position: fixed;
     left: 0;
     bottom: 0;
     right: 0;
     .tele{
       width:43vw;
       height:12vw;
       border-radius:0.6vw;
       border:none;
       outline: none;
       font-size:4.17vw;
       margin-bottom:3vw;
       margin-left:4.5vw;
     }
     .tele1{
       background:white;
       border: solid #5fc0cd 0.2vw;;
       color:#5fc0cd;
     }
     .tele2{
       background:#5fc0cd;
       color: #FFFFFF;
     }

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