# css 实现炫酷丝带特殊标签效果

# 快速导航

# 双边丝带效果

距离高考还有10天
点击即可查看代码

html 代码

<div class="wrap">
  <span>距离高考还有10天</span>
</div>
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css 代码

.wrap {
  position: relative;
  display: inline-block;
  left: 50%;
  top: 20px;
}

.wrap span {
  position: relative;
  z-index: 2;
  display: inline-block;
  padding: 0 15px;
  height: 32px;
  line-height: 32px;
  background-color: #42b983;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 10px 6px -9px rgba(0, 0, 0, 0.6);
}

.wrap span::before,
.wrap span::after {
  position: absolute;
  bottom: -6px;
  border-width: 3px 5px;
  border-style: solid;
  content: '';
}

.wrap span::before {
  left: 0;
  border-color: #42b983 #42b983 transparent transparent; // 上 右 下(透明)(透明)
}

.wrap span::after {
  right: 0;
  border-color: #42b983 transparent transparent #42b983;
}

.wrap::before,
.wrap::after {
  position: absolute;
  top: 6px;
  content: '';
  border-style: solid;
  border-color: #42b983;
}

.wrap::before {
  left: -32px;
  border-width: 16px 26px 16px 16px; // 上 右 下 左
  border-left-color: transparent; // 左边border的颜色透明
}

.wrap::after {
  right: -32px;
  border-width: 16px 16px 16px 26px;
  border-right-color: transparent; // 右边brder颜色透明
}
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实现原理:绝对定位position:absolute,结合伪元素(::before,::after),边框border,制作三角形的原理,控制border的四个角的宽度,颜色,transparent透明

# 右边丝带效果

距离高考还有9天
点击即可查看代码

html 代码

<div class="wrap">
  <span class="text">距离结束还有10天</span>
</div>
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css 代码

.wrap {
  text-align: center;
}
.text {
  position: relative;
  display: inline-block;
  padding: 0 15px;
  height: 32px;
  line-height: 32px;
  background-color: #42b983;
  color: #fff;
  font-size: 16px;
}

.text::before {
  position: absolute;
  top: -4px;
  left: 0;
  border-width: 2px 4px;
  border-style: solid;
  border-color: transparent #42b983 #42b983 transparent;
  content: '';
}

.text::after {
  position: absolute;
  top: 0;
  right: -8px;
  border-width: 16px 8px 16px 0;
  border-style: solid;
  border-color: #42b983 transparent #42b983 #42b983;
  content: '';
}
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# 箭头丝带效果

距离高考还有8天
点击即可查看代码

html 代码

<div class="wrap">
  <span class="text">距离高考还有10天</span>
</div>
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css 代码

.wrap {
  text-align: center;
}
.text {
  position: relative;
  display: inline-block;
  margin-right: 16px;
  padding: 0 10px;
  height: 32px;
  line-height: 32px;
  background-color: #42b983;
  color: #fff;
  font-size: 16px;
}

.text::before {
  position: absolute;
  top: 0;
  left: -16px;
  border-width: 16px 16px 16px 0;
  border-style: solid;
  border-color: transparent #42b983 transparent transparent;
  content: '';
}

.text::after {
  position: absolute;
  top: 0;
  right: -16px;
  border-width: 16px 16px 16px 0;
  border-style: solid;
  border-color: #42b983 transparent #42b983 #42b983;
  content: '';
}
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# 多个箭头丝带效果

距离高考还有8天 距离高考还有7天 距离高考还有6天
点击即可查看代码
<div class="wrap">
  <span class="text">距离高考还有8天</span>
  <span class="text">距离高考还有7天</span>
  <span class="text">距离高考还有6天</span>
</div>
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css 代码与上面一致

# 悬挂标签

随笔川迹
itclanCoder
点击即可查看代码

html 代码

<div class="wrap">
  <div class="left">
    <span>随笔川迹</span>
  </div>
  <div class="right">
    <span>itclanCoder</span>
  </div>
</div>
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css 代码

.wrap {
  position: relative;
  background-color: #eee;
  height: 200px;
}
.left {
  width: 200px;
  height: 140px;
  position: absolute; // 绝对定位
  top: -8px;
  left: -8px;
  overflow: hidden;
}

.left::before {
  position: absolute;
  left: 124px;
  border-radius: 8px 8px 0 0; // 上 右 下 左
  width: 16px;
  height: 8px;
  background-color: #42b983;
  content: '';
}

.left::after {
  position: absolute;
  left: 0;
  top: 124px;
  border-radius: 0 8px 8px 0;
  width: 8px;
  height: 16px;
  background-color: #42b983;
  content: '';
}

.left span {
  display: inline-block;
  text-align: center;
  width: 200px;
  height: 40px;
  line-height: 40px;
  position: absolute;
  top: 30px;
  left: -50px;
  z-index: 2;
  overflow: hidden;
  -ms-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
  border: 1px dashed #fff; // 虚线边框
  box-shadow: 0 0 0 3px #42b983, 0 14px 7px -9px rgba(0, 0, 0, 0.6);
  background-color: #42b983;
  color: #fff;
}

.right {
  width: 140px;
  height: 200px;
  position: absolute;
  top: -8px;
  right: -8px;
  overflow: hidden;
}

.right::before {
  position: absolute;
  right: 124px;
  border-radius: 8px 8px 0 0;
  width: 16px;
  height: 8px;
  background-color: #42b983;
  content: '';
}

.right::after {
  position: absolute;
  right: 0;
  top: 124px;
  border-radius: 0 8px 8px 0;
  width: 8px;
  height: 16px;
  background-color: #42b983;
  content: '';
}

.right span {
  display: inline-block;
  text-align: center;
  width: 200px;
  height: 40px;
  line-height: 40px;
  position: absolute;
  top: 30px;
  right: -50px;
  z-index: 2;
  overflow: hidden;
  -ms-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  border: 1px dashed #fff;
  box-shadow: 0 0 0 3px #42b983, 0 14px 7px -9px rgba(0, 0, 0, 0.6);
  background-color: #42b983;
  color: #fff;
}
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实现原理: 伪元素::before,::after结合绝对定位position: absolute,以及 css3 中的变换transform,rotate旋转

关于伪元素的可参考:css 中的伪类与伪元素

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