<template>
  <div class="sk-circle" :style="style.outer">
    <div v-for="index in nums"
         :class="[`sk-circle${index}`, 'sk-child']">
         <div class="before" 
              :class="classes" 
              :style="style.inner"></div>
    </div>
  </div>
</template>
<script>
export default {
  props: {
    color: {
      type: String,
      default: ''
    },
    classes: {
      type: Array,
      default: () => []
    },
    size: {
      type: Number,
      default: 20
    }
  },
  data: function() {
    return {
      nums: [],
      style: {
        inner: {
          background: this.color
        },
        outer: {
          width: this.size + 'px',
          height: this.size + 'px'
        }
      }
    }
  },
  created() {
    for (let i = 1; i <= 12; i++) {
      this.nums.push(i)
    }
  }
}
</script>
<style>
.sk-circle {
  width: 40px;
  height: 40px;
  position: relative;
}
.sk-circle .sk-child {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
}
.sk-circle .sk-child .before {
  display: block;
  margin: 0 auto;
  width: 15%;
  height: 15%;
  border-radius: 100%;
  -webkit-animation: sk-circleBounceDelay 1.2s infinite ease-in-out both;
          animation: sk-circleBounceDelay 1.2s infinite ease-in-out both;
}
.sk-circle .sk-circle2 {
  -webkit-transform: rotate(30deg);
      -ms-transform: rotate(30deg);
          transform: rotate(30deg); }
.sk-circle .sk-circle3 {
  -webkit-transform: rotate(60deg);
      -ms-transform: rotate(60deg);
          transform: rotate(60deg); }
.sk-circle .sk-circle4 {
  -webkit-transform: rotate(90deg);
      -ms-transform: rotate(90deg);
          transform: rotate(90deg); }
.sk-circle .sk-circle5 {
  -webkit-transform: rotate(120deg);
      -ms-transform: rotate(120deg);
          transform: rotate(120deg); }
.sk-circle .sk-circle6 {
  -webkit-transform: rotate(150deg);
      -ms-transform: rotate(150deg);
          transform: rotate(150deg); }
.sk-circle .sk-circle7 {
  -webkit-transform: rotate(180deg);
      -ms-transform: rotate(180deg);
          transform: rotate(180deg); }
.sk-circle .sk-circle8 {
  -webkit-transform: rotate(210deg);
      -ms-transform: rotate(210deg);
          transform: rotate(210deg); }
.sk-circle .sk-circle9 {
  -webkit-transform: rotate(240deg);
      -ms-transform: rotate(240deg);
          transform: rotate(240deg); }
.sk-circle .sk-circle10 {
  -webkit-transform: rotate(270deg);
      -ms-transform: rotate(270deg);
          transform: rotate(270deg); }
.sk-circle .sk-circle11 {
  -webkit-transform: rotate(300deg);
      -ms-transform: rotate(300deg);
          transform: rotate(300deg); }
.sk-circle .sk-circle12 {
  -webkit-transform: rotate(330deg);
      -ms-transform: rotate(330deg);
          transform: rotate(330deg); }
.sk-circle .sk-circle2 .before {
  -webkit-animation-delay: -1.1s;
          animation-delay: -1.1s; }
.sk-circle .sk-circle3 .before {
  -webkit-animation-delay: -1s;
          animation-delay: -1s; }
.sk-circle .sk-circle4 .before {
  -webkit-animation-delay: -0.9s;
          animation-delay: -0.9s; }
.sk-circle .sk-circle5 .before {
  -webkit-animation-delay: -0.8s;
          animation-delay: -0.8s; }
.sk-circle .sk-circle6 .before {
  -webkit-animation-delay: -0.7s;
          animation-delay: -0.7s; }
.sk-circle .sk-circle7 .before {
  -webkit-animation-delay: -0.6s;
          animation-delay: -0.6s; }
.sk-circle .sk-circle8 .before {
  -webkit-animation-delay: -0.5s;
          animation-delay: -0.5s; }
.sk-circle .sk-circle9 .before {
  -webkit-animation-delay: -0.4s;
          animation-delay: -0.4s; }
.sk-circle .sk-circle10 .before {
  -webkit-animation-delay: -0.3s;
          animation-delay: -0.3s; }
.sk-circle .sk-circle11 .before {
  -webkit-animation-delay: -0.2s;
          animation-delay: -0.2s; }
.sk-circle .sk-circle12 .before {
  -webkit-animation-delay: -0.1s;
          animation-delay: -0.1s; }

@-webkit-keyframes sk-circleBounceDelay {
  0%, 80%, 100% {
    -webkit-transform: scale(0);
            transform: scale(0);
  } 40% {
    -webkit-transform: scale(1);
            transform: scale(1);
  }
}

@keyframes sk-circleBounceDelay {
  0%, 80%, 100% {
    -webkit-transform: scale(0);
            transform: scale(0);
  } 40% {
    -webkit-transform: scale(1);
            transform: scale(1);
  }
}
</style>


