CSS --记录

CSS3与文字渐变光影流动动画效果实现

by zhangxinxu from http://www.zhangxinxu.com
本文地址：http://www.zhangxinxu.com/wordpress/?p=4016

1.shape-outside，shape-margin等;

by zhangxinxu from https://www.zhangxinxu.com/wordpress/?p=8453

2.小tips:了解CSS/CSS3原生变量var

by zhangxinxu from http://www.zhangxinxu.com/wordpress/?p=5804

3.常见的CSS图形绘制合集

#square {
  width: 100px;
  height: 100px;
  background: red;
}

#rectangle {
  width: 200px;
  height: 100px;
  background: red;
}

#circle {
  width: 100px;
  height: 100px;
  background: red;
  border-radius: 50%
}

#oval {
  width: 200px;
  height: 100px;
  background: red;
  border-radius: 100px / 50px;
}

#triangle-up {
  width:;
  height:;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 100px solid red;
}

#triangle-down {
  width:;
  height:;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid red;
}

#triangle-left {
  width:;
  height:;
  border-top: 50px solid transparent;
  border-right: 100px solid red;
  border-bottom: 50px solid transparent;
}

#triangle-right {
  width:;
  height:;
  border-top: 50px solid transparent;
  border-left: 100px solid red;
  border-bottom: 50px solid transparent;
}

#triangle-topleft {
  width:;
  height:;
  border-top: 100px solid red;
  border-right: 100px solid transparent;
}

#triangle-topright {
  width:;
  height:;
  border-top: 100px solid red;
  border-left: 100px solid transparent;
}

#triangle-bottomleft {
  width:;
  height:;
  border-bottom: 100px solid red;
  border-right: 100px solid transparent;
}

#triangle-bottomright {
  width:;
  height:;
  border-bottom: 100px solid red;
  border-left: 100px solid transparent;
}

#curvedarrow {
  position: relative;
  width:;
  border-top: 90px solid transparent;
  border-right: 90px solid red;
  transform: rotate(10deg) translateX(100%);
}
#curvedarrow:after {
  content: "";
  position: absolute;
  border: 0 solid transparent;
  border-top: 30px solid red;
  border-radius: 200px 0 0 0;
  top: -120px;
  left: -90px;
  width: 120px;
  height: 120px;
  transform: rotate(45deg);
}

#trapezoid {
  border-bottom: 100px solid red;
  border-left: 25px solid transparent;
  border-right: 25px solid transparent;
  height:;
  width: 100px;
}

#parallelogram {
  width: 150px;
  height: 100px;
  transform: skew(20deg);
  background: red;
}

#star-six {
  width:;
  height:;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 100px solid red;
  position: relative;
}
#star-six:after {
  width:;
  height:;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid red;
  position: absolute;
  content: "";
  top: 30px;
  left: -50px;
}

#star-five {
  margin: 50px 0;
  position: relative;
  display: block;
  color: red;
  width: 0px;
  height: 0px;
  border-right: 100px solid transparent;
  border-bottom: 70px solid red;
  border-left: 100px solid transparent;
  transform: rotate(35deg);
}
#star-five:before {
  border-bottom: 80px solid red;
  border-left: 30px solid transparent;
  border-right: 30px solid transparent;
  position: absolute;
  height:;
  width:;
  top: -45px;
  left: -65px;
  display: block;
  content: '';
  transform: rotate(-35deg);
}
#star-five:after {
  position: absolute;
  display: block;
  color: red;
  top: 3px;
  left: -105px;
  width: 0px;
  height: 0px;
  border-right: 100px solid transparent;
  border-bottom: 70px solid red;
  border-left: 100px solid transparent;
  transform: rotate(-70deg);
  content: '';
}

#pentagon {
  position: relative;
  width: 54px;
  box-sizing: content-box;
  border-width: 50px 18px 0;
  border-style: solid;
  border-color: red transparent;
}
#pentagon:before {
  content: "";
  position: absolute;
  height:;
  width:;
  top: -85px;
  left: -18px;
  border-width: 0 45px 35px;
  border-style: solid;
  border-color: transparent transparent red;
}

#hexagon {
  width: 100px;
  height: 55px;
  background: red;
  position: relative;
}
#hexagon:before {
  content: "";
  position: absolute;
  top: -25px;
  left:;
  width:;
  height:;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 25px solid red;
}
#hexagon:after {
  content: "";
  position: absolute;
  bottom: -25px;
  left:;
  width:;
  height:;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 25px solid red;
}

#octagon {
  width: 100px;
  height: 100px;
  background: red;
  position: relative;
}
#octagon:before {
  content: "";
  width: 100px;
  height:;
  position: absolute;
  top:;
  left:;
  border-bottom: 29px solid red;
  border-left: 29px solid #fff;
  border-right: 29px solid #fff;
  box-sizing: border-box;
}
#octagon:after {
  content: "";
  width: 100px;
  height:;
  position: absolute;
  bottom:;
  left:;
  border-top: 29px solid red;
  border-left: 29px solid #fff;
  border-right: 29px solid #fff;
  box-sizing: border-box;
}  

#heart {
  position: relative;
  width: 100px;
  height: 90px;
}
#heart:before,
#heart:after {
  position: absolute;
  content: "";
  left: 50px;
  top:;
  width: 50px;
  height: 80px;
  background: red;
  border-radius: 50px 50px 0 0;
  transform: rotate(-45deg);
  transform-origin: 0 100%;
}
#heart:after {
  left:;
  transform: rotate(45deg);
  transform-origin: 100% 100%;
}

#infinity {
  position: relative;
  width: 212px;
  height: 100px;
  box-sizing: content-box;
}
#infinity:before,
#infinity:after {
  content: "";
  box-sizing: content-box;
  position: absolute;
  top:;
  left:;
  width: 60px;
  height: 60px;
  border: 20px solid red;
  border-radius: 50px 50px 0 50px;
  transform: rotate(-45deg);
}
#infinity:after {
  left: auto;
  right:;
  border-radius: 50px 50px 50px 0;
  transform: rotate(45deg);
}

#diamond {
  width:;
  height:;
  border: 50px solid transparent;
  border-bottom-color: red;
  position: relative;
  top: -50px;
}
#diamond:after {
  content: '';
  position: absolute;
  left: -50px;
  top: 50px;
  width:;
  height:;
  border: 50px solid transparent;
  border-top-color: red;
}

#diamond-shield {
  width:;
  height:;
  border: 50px solid transparent;
  border-bottom: 20px solid red;
  position: relative;
  top: -50px;
}
#diamond-shield:after {
  content: '';
  position: absolute;
  left: -50px;
  top: 20px;
  width:;
  height:;
  border: 50px solid transparent;
  border-top: 70px solid red;
}

#diamond-narrow {
  width:;
  height:;
  border: 50px solid transparent;
  border-bottom: 70px solid red;
  position: relative;
  top: -50px;
}
#diamond-narrow:after {
  content: '';
  position: absolute;
  left: -50px;
  top: 70px;
  width:;
  height:;
  border: 50px solid transparent;
  border-top: 70px solid red;
}

#cut-diamond {
  border-style: solid;
  border-color: transparent transparent red transparent;
  border-width: 0 25px 25px 25px;
  height:;
  width: 50px;
  box-sizing: content-box;
  position: relative;
  margin: 20px 0 50px 0;
}
#cut-diamond:after {
  content: "";
  position: absolute;
  top: 25px;
  left: -25px;
  width:;
  height:;
  border-style: solid;
  border-color: red transparent transparent transparent;
  border-width: 70px 50px 0 50px;
}

#egg {
  display: block;
  width: 126px;
  height: 180px;
  background-color: red;
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
}

#pacman {
  width: 0px;
  height: 0px;
  border-right: 60px solid transparent;
  border-top: 60px solid red;
  border-left: 60px solid red;
  border-bottom: 60px solid red;
  border-top-left-radius: 60px;
  border-top-right-radius: 60px;
  border-bottom-left-radius: 60px;
  border-bottom-right-radius: 60px;
}

#talkbubble {
  width: 120px;
  height: 80px;
  background: red;
  position: relative;
  -moz-border-radius: 10px;
  -webkit-border-radius: 10px;
  border-radius: 10px;
}
#talkbubble:before {
  content: "";
  position: absolute;
  right: 100%;
  top: 26px;
  width:;
  height:;
  border-top: 13px solid transparent;
  border-right: 26px solid red;
  border-bottom: 13px solid transparent;
}

#burst-12 {
  background: red;
  width: 80px;
  height: 80px;
  position: relative;
  text-align: center;
}
#burst-12:before,
#burst-12:after {
  content: "";
  position: absolute;
  top:;
  left:;
  height: 80px;
  width: 80px;
  background: red;
}
#burst-12:before {
  transform: rotate(30deg);
}
#burst-12:after {
  transform: rotate(60deg);
}

#burst-8 {
  background: red;
  width: 80px;
  height: 80px;
  position: relative;
  text-align: center;
  transform: rotate(20deg);
}
#burst-8:before {
  content: "";
  position: absolute;
  top:;
  left:;
  height: 80px;
  width: 80px;
  background: red;
  transform: rotate(135deg);
}

#yin-yang {
  width: 96px;
  height: 48px;
  background: #fff;
  border-color: red;
  border-style: solid;
  border-width: 2px 2px 50px 2px;
  border-radius: 100%;
  position: relative;
}
#yin-yang:before {
  content: "";
  position: absolute;
  top: 50%;
  left:;
  background: #fff;
  border: 18px solid red;
  border-radius: 100%;
  width: 12px;
  height: 12px;
}
#yin-yang:after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: red;
  border: 18px solid #fff;
  border-radius: 100%;
  width: 12px;
  height: 12px;
}

#badge-ribbon {
  position: relative;
  background: red;
  height: 100px;
  width: 100px;
  border-radius: 50px;
}
#badge-ribbon:before,
#badge-ribbon:after {
  content: '';
  position: absolute;
  border-bottom: 70px solid red;
  border-left: 40px solid transparent;
  border-right: 40px solid transparent;
  top: 70px;
  left: -10px;
  transform: rotate(-140deg);
}
#badge-ribbon:after {
  left: auto;
  right: -10px;
  transform: rotate(140deg);
}

#space-invader {
  box-shadow: 0 0 0 1em red,
  0 1em 0 1em red,
  -2.5em 1.5em 0 .5em red,
  2.5em 1.5em 0 .5em red,
  -3em -3em 0 0 red,
  3em -3em 0 0 red,
  -2em -2em 0 0 red,
  2em -2em 0 0 red,
  -3em -1em 0 0 red,
  -2em -1em 0 0 red,
  2em -1em 0 0 red,
  3em -1em 0 0 red,
  -4em 0 0 0 red,
  -3em 0 0 0 red,
  3em 0 0 0 red,
  4em 0 0 0 red,
  -5em 1em 0 0 red,
  -4em 1em 0 0 red,
  4em 1em 0 0 red,
  5em 1em 0 0 red,
  -5em 2em 0 0 red,
  5em 2em 0 0 red,
  -5em 3em 0 0 red,
  -3em 3em 0 0 red,
  3em 3em 0 0 red,
  5em 3em 0 0 red,
  -2em 4em 0 0 red,
  -1em 4em 0 0 red,
  1em 4em 0 0 red,
  2em 4em 0 0 red;
  background: red;
  width: 1em;
  height: 1em;
  overflow: hidden;
  margin: 50px 0 70px 65px;
}

#tv {
  position: relative;
  width: 200px;
  height: 150px;
  margin: 20px 0;
  background: red;
  border-radius: 50% / 10%;
  color: white;
  text-align: center;
  text-indent: .1em;
}
#tv:before {
  content: '';
  position: absolute;
  top: 10%;
  bottom: 10%;
  right: -5%;
  left: -5%;
  background: inherit;
  border-radius: 5% / 50%;
}

#chevron {
  position: relative;
  text-align: center;
  padding: 12px;
  margin-bottom: 6px;
  height: 60px;
  width: 200px;
}
#chevron:before {
  content: '';
  position: absolute;
  top:;
  left:;
  height: 100%;
  width: 51%;
  background: red;
  transform: skew(0deg, 6deg);
}
#chevron:after {
  content: '';
  position: absolute;
  top:;
  right:;
  height: 100%;
  width: 50%;
  background: red;
  transform: skew(0deg, -6deg);
}

#magnifying-glass {
  font-size: 10em;
  display: inline-block;
  width: 0.4em;
  box-sizing: content-box;
  height: 0.4em;
  border: 0.1em solid red;
  position: relative;
  border-radius: 0.35em;
}
#magnifying-glass:before {
  content: "";
  display: inline-block;
  position: absolute;
  right: -0.25em;
  bottom: -0.1em;
  border-width:;
  background: red;
  width: 0.35em;
  height: 0.08em;
  transform: rotate(45deg);
}

#facebook-icon {
  background: red;
  text-indent: -999em;
  width: 100px;
  height: 110px;
  box-sizing: content-box;
  border-radius: 5px;
  position: relative;
  overflow: hidden;
  border: 15px solid red;
  border-bottom:;
}
#facebook-icon:before {
  content: "/20";
  position: absolute;
  background: red;
  width: 40px;
  height: 90px;
  bottom: -30px;
  right: -37px;
  border: 20px solid #fff;
  border-radius: 25px;
  box-sizing: content-box;
}
#facebook-icon:after {
  content: "/20";
  position: absolute;
  width: 55px;
  top: 50px;
  height: 20px;
  background: #fff;
  right: 5px;
  box-sizing: content-box;
}

#moon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  box-shadow: 15px 15px 0 0 red;
}

#flag {
  width: 110px;
  height: 56px;
  padding-top: 15px;
  position: relative;
  background: red;
}
#flag:after {
  content: "";
  position: absolute;
  left:;
  bottom:;
  width:;
  height:;
  border-bottom: 13px solid #fff;
  border-left: 55px solid transparent;
  border-right: 55px solid transparent;
}

#cone {
  width:;
  height:;
  border-left: 70px solid transparent;
  border-right: 70px solid transparent;
  border-top: 100px solid red;
  border-radius: 50%;
}

#cross {
  background: red;
  height: 100px;
  position: relative;
  width: 20px;
}
#cross:after {
  background: red;
  content: "";
  height: 20px;
  left: -40px;
  position: absolute;
  top: 40px;
  width: 100px;
}

#base {
  background: red;
  display: inline-block;
  height: 55px;
  margin-left: 20px;
  margin-top: 55px;
  position: relative;
  width: 100px;
}
#base:before {
  border-bottom: 35px solid red;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  content: "";
  height:;
  left:;
  position: absolute;
  top: -35px;
  width:;
}

#pointer {
  width: 200px;
  height: 40px;
  position: relative;
  background: red;
}
#pointer:after {
  content: "";
  position: absolute;
  left:;
  bottom:;
  width:;
  height:;
  border-left: 20px solid white;
  border-top: 20px solid transparent;
  border-bottom: 20px solid transparent;
}
#pointer:before {
  content: "";
  position: absolute;
  right: -20px;
  bottom:;
  width:;
  height:;
  border-left: 20px solid red;
  border-top: 20px solid transparent;
  border-bottom: 20px solid transparent;
}

#lock {
  font-size: 8px;
  position: relative;
  width: 18em;
  height: 13em;
  border-radius: 2em;
  top: 10em;
  box-sizing: border-box;
  border: 3.5em solid red;
  border-right-width: 7.5em;
  border-left-width: 7.5em;
  margin: 0 0 6rem 0;
}
#lock:before {
  content: "";
  box-sizing: border-box;
  position: absolute;
  border: 2.5em solid red;
  width: 14em;
  height: 12em;
  left: 50%;
  margin-left: -7em;
  top: -12em;
  border-top-left-radius: 7em;
  border-top-right-radius: 7em;
}
#lock:after {
  content: "";
  box-sizing: border-box;
  position: absolute;
  border: 1em solid red;
  width: 5em;
  height: 8em;
  border-radius: 2.5em;
  left: 50%;
  top: -1em;
  margin-left: -2.5em;
}
  

by zhangxinxu from https://www.zhangxinxu.com/wordpress/?p=8386

3.css无缝滚动

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
@-webkit-keyframes move
{
    0%{
        left:0;
    }
    100%
    {
        left:-500px;
    }
}
#wrap{ width:500px;height:100px;border:1px solid #000; position:relative;margin:100px auto; overflow:hidden;}
#list{ position:absolute;left:0;top:0;margin:0;padding:0; -webkit-animation:3s move infinite linear; width:200%;}
#list li{ list-style:none;width:98px;height:98px;border:1px solid #fff;background:#000; color:#fff; font:50px/98px Arial; text-align:center; float:left;}
#wrap:hover #list{ -webkit-animation-play-state:paused;}
</style>
</head>
<body>
<div id="wrap">
    <ul id="list">
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
</div>
</body>
</html>

 4.微信群聊天头像显示（伪元素布局）

by zhangxinxu from https://www.zhangxinxu.com/wordpress/?p=8540

5.max-height:更多显示与收起缓动效果

<div class="minHeight">
        <input type="checkbox" id="checkbox">
        <p class="elements">fhsagihiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhsagi
            hiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhs
            agihiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhsagihiaoghoagifhsagihiaoghoagi</p>
        <label for="checkbox" class="inp-label label-in">更多</label>
        <label for="checkbox" class="inp-label label-out">收起</label>
    </div>

#checkbox {
            opacity:;
            position: absolute;
        }

        .elements {
            width: 50px;
            max-height: 10px;
            transition: 0.3s;
            overflow: hidden;
            word-break: break-all;
        }

        :checked~.elements {
            max-height: 500px;
        }

        :checked~.label-in {
            display: none;
        }

        :checked~.label-out {
            display: inline-block;
        }

        .label-out {
            display: none;
        }

6.块状元素右对齐：margin-left:auto可以实现，不一定用float：right

7.弹窗背景毛玻璃现象,backdrop-filter:blur(5px);

　　

by zhangxinxu from https://www.zhangxinxu.com/wordpress/2019/11/css-backdrop-filter/

　　

8.响应式正方形样式 .box{width:25%;height:0;padding-bottom:25%;background:red;}

9.css实现下划线跟随导航栏移动

<div class="tabbar-box flex flexAlignCenter">
                    <div class="tab-item"><a href="/">首页</a></div>
                    <div class="tab-item"><a href="/">产品</a></div>
                    <div class="tab-item"><a href="/">价格</a></div>
                    <div class="tab-item"><a href="/">下载中心    </a</div>
                    <div class="tab-item"><a href="/">联系我们</a</div>
</div>

header .tabbar-box .tab-item{
    padding: 0 20px;
    position: relative;
    font-size: 18px;
    transition: 0.3;
    flex-shrink:;

}
header .tabbar-box .tab-item::after{
    content:'/';
    position: absolute;
    display: block;
    right:;
    bottom: 5px;
}
header .tabbar-box .tab-item:last-child::after{
    content:'';
}
header .tabbar-box .tab-item a{
    transition: 0.3s;
    display: block;
    padding: 0 10px 5px;
    position: relative;
}
header .tabbar-box .tab-item a::before{
    position: absolute;
    left: 100%;
    top:;
    border-bottom: 2px solid transparent;
    width:;
    height: 100%;
    content: "";
    transition: all 300ms;
}
header .tabbar-box .tab-item:hover a{
    color: #cd651b;
}

header .tabbar-box .tab-item:hover a::before{
    left:;
    top:;
    z-index: -1;
    border-bottom-color: #cd651b;
    width: 100%;
    transition-delay: 100ms;
}
header .tabbar-box .tab-item:hover + div a::before{
    left:;
}

10.让CSS flex布局最后一行列表左对齐的N种方法 link:https://www.zhangxinxu.com/wordpress/2019/08/css-flex-last-align/