css 闪烁灯样式

样式一：

  <div class="point point-flicker" >
  </div>

.point {
  width: 38px;
  height: 38px;
  background-color: #2ea598;
  position: relative;
  border-radius: 50%;
}

/* 设置动画前颜色 */
.point-flicker:after {
  background-color: #61d3ff;
}

/* 设置动画后颜色 */
.point-flicker:before {
  background-color: rgba(0, 168, 253, 0.2);
}

/* 设置动画 */
.point-flicker:before,
.point-flicker:after {
  content: '';
  width: 50px;
  height: 50px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -25px;
  margin-top: -25px;
  border-radius: 50%;
  animation: warn 1.5s ease-out 0s infinite;
}

@keyframes warn {
  0% {
    transform: scale(0.5);
    opacity: 1;
  }

  30% {
    opacity: 1;
  }

  100% {
    transform: scale(1.4);
    opacity: 0;
  }
}

样式二：

<div :class="[ 'pointStyle',
                        {
                          green: item.state == '正常',
                          red: item.state == '出错',
                          gray: item.state == '待检'
                        },
                      ]"
></div>

.pointStyle {
  width: 28px;
  height: 28px;
  background-color: #37c7ff;
  border-radius: 50%;
  &.green {
    background-color: #37ff66;
    -webkit-animation: twinkling 0.2s infinite ease-in-out;
  }
  &.gray {
    background-color: #cfcedf;
    -webkit-animation: twinkling 0.2s infinite ease-in-out;
  }
  &.red {
    background-color: #ff5555;
    -webkit-animation: twinkling 0.2s infinite ease-in-out;
  }
}

@-webkit-keyframes twinkling {
  /*透明度由0到1*/
  0% {
    opacity: 0.4; /*透明度为0*/
  }
  50% {
    opacity: 0.8; /*透明度为0*/
  }
  100% {
    opacity: 1; /*透明度为1*/
  }
}