css装饰旗

“我正在参加 码上掘金体验活动，详情：show出你的创意代码块”

一起养成写作习惯！这是我参与「掘金日新计划 · 4 月更文挑战」的第10天，点击查看活动详情。

实现方式是css做一根绳，然后做三角星并给三角形不同的颜色，通过定位position和-webkit-transform旋转三角形角度的方式，这样一个装饰的旗就有了

星星也是通过css绘制的 然后使用css动画 这样星星就会上下移动了

@keyframes example {
  0%   {top:600px;}
  100% {top:20px;}
}

#xing {
  margin: 50px 0;
  position: absolute;
  left: 50px;
  top: 600px;
  display: block;
  color: #FD9582;
  width: 0px;
  height: 0px;
  border-right:  100px solid transparent;
  border-bottom: 70px  solid #FD9582;
  border-left:   100px solid transparent;
  -moz-transform:    rotate(35deg);
  -webkit-transform: rotate(35deg);
  -ms-transform:     rotate(35deg);
  -o-transform:      rotate(35deg);
  animation-name: example;
  animation-duration: 1s;
  animation-iteration-count: infinite;
}
#xing:before {
  border-bottom: 80px solid #FD9582;
  border-left: 30px solid transparent;
  border-right: 30px solid transparent;
  position: absolute;
  height: 0;
  width: 0;
  top: -45px;
  left: -65px;
  display: block;
  content: '';
  -webkit-transform: rotate(-35deg);
  -moz-transform:    rotate(-35deg);
  -ms-transform:     rotate(-35deg);
  -o-transform:      rotate(-35deg);
}
#xing:after {
  position: absolute;
  display: block;
  color: r#FD9582ed;
  top: 3px;
  left: -105px;
  width: 0px;
  height: 0px;
  border-right: 100px solid transparent;
  border-bottom: 70px solid #FD9582;
  border-left: 100px solid transparent;
  -webkit-transform: rotate(-70deg);
  -moz-transform:    rotate(-70deg);
  -ms-transform:     rotate(-70deg);
  -o-transform:      rotate(-70deg);
  content: '';
}

div布局

<div class='box'></div>

<div id='xing'></div>

<div id='sj'></div>
<div id='sja'></div>
<div id='sjb'></div>
<div id='sjc'></div>
<div id='sjd'></div>

<div class='text'>元旦晚会，现在开始</div>

<div style="margin:0 auto;width:70%;margin-top:400px;display:flex">
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-hua"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-hua1"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-huahua"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-lihua"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-bouquet"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-huachujujuhuabaihua"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-huahonghuazhiwuhuaduo"></use>
  </svg>
  <svg class="icon" aria-hidden="true">
    <use xlink:href="#icon-huahuahuahuaduozhiwu"></use>
  </svg>
</div>

css样式

.text{
  background-image: linear-gradient(to bottom, orange, red);
  -webkit-background-clip: text;
  color: transparent;
  font-size: 45px;
  text-align: center;
  position: relative;
  top: 250px;
}
@keyframes example {
  0%   {top:600px;}
  100% {top:20px;}
}
#xing {
  margin: 50px 0;
  position: absolute;
  left: 50px;
  top: 600px;
  display: block;
  color: #FD9582;
  width: 0px;
  height: 0px;
  border-right:  100px solid transparent;
  border-bottom: 70px  solid #FD9582;
  border-left:   100px solid transparent;
  -moz-transform:    rotate(35deg);
  -webkit-transform: rotate(35deg);
  -ms-transform:     rotate(35deg);
  -o-transform:      rotate(35deg);
  animation-name: example;
  animation-duration: 1s;
  animation-iteration-count: infinite;
}
#xing:before {
  border-bottom: 80px solid #FD9582;
  border-left: 30px solid transparent;
  border-right: 30px solid transparent;
  position: absolute;
  height: 0;
  width: 0;
  top: -45px;
  left: -65px;
  display: block;
  content: '';
  -webkit-transform: rotate(-35deg);
  -moz-transform:    rotate(-35deg);
  -ms-transform:     rotate(-35deg);
  -o-transform:      rotate(-35deg);
}
#xing:after {
  position: absolute;
  display: block;
  color: r#FD9582ed;
  top: 3px;
  left: -105px;
  width: 0px;
  height: 0px;
  border-right: 100px solid transparent;
  border-bottom: 70px solid #FD9582;
  border-left: 100px solid transparent;
  -webkit-transform: rotate(-70deg);
  -moz-transform:    rotate(-70deg);
  -ms-transform:     rotate(-70deg);
  -o-transform:      rotate(-70deg);
  content: '';
}
.box {
  width: 600px;
  margin: 0 auto;
  height: 100px;
  border: 15px solid #F7B1BD;
  border-radius: 0 0 50% 50%/0 0 100% 100% ;
  border-top: none;
}

#sj {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid #2594CF;
  position: absolute;
  top: 54px;
  left:26.5%;
  -webkit-transform: rotate(29deg)
}
#sja {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid #C9DD72;
  position: absolute;
  top: 96px;
  left:35%;
  -webkit-transform: rotate(9deg)
}
#sjb {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid #67C7CD;
  position: absolute;
  top: 111px;
  left:44%;
  -webkit-transform: rotate(1deg)
}
#sjc {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid #8ECBBE;
  position: absolute;
  top: 105px;
  left:54%;
  -webkit-transform: rotate(-8deg)
}
#sjd {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-top: 100px solid #FBA558;
  position: absolute;
  top: 75px;
  left:63%;
  -webkit-transform: rotate(-21deg)
}

下面花花的图标是引用了阿里图标库资源 at.alicdn.com/t/font_3325…

效果

码上掘金 (juejin.cn)