ajax请求过程中的loading界面

要求：在ajax发送请求时，呈现获取数据的一个loading界面，但数据请求成功时loading界面消失。

//html
<!-- loading -->
      <div class="loadingcontainer" :style="{display:disp}">
          <div class="spinner">
            <div class="spinner-container container1">
              <div class="circle1"></div>
              <div class="circle2"></div>
              <div class="circle3"></div>
              <div class="circle4"></div>
            </div>
            <div class="spinner-container container2">
              <div class="circle1"></div>
              <div class="circle2"></div>
              <div class="circle3"></div>
              <div class="circle4"></div>
            </div>
            <div class="spinner-container container3">
              <div class="circle1"></div>
              <div class="circle2"></div>
              <div class="circle3"></div>
              <div class="circle4"></div>
            </div>
          </div>
      </div>

//css
.loadingcontainer{ 
      width: 100%; 
      height: 100%; 
      background-color: rgba(255,255,255,.4); 
      position: fixed; 
      z-index: 300; 
      top:0;
  }
  @media only screen and (max-width: 350px){
  .a_conts p{font-size: 10px;}
  .a_conts h2{font-size: 12px;}
}

@-webkit-keyframes leftRight {
0% {
    -webkit-transform: translate3d(-100%, 0, 0);
            transform: translate3d(-100%, 0, 0);
}
100% {
    -webkit-transform: translate3d(150%, 0, 0);
            transform: translate3d(150%, 0, 0);
}
}
@keyframes leftRight {
0% {
    -webkit-transform: translate3d(-100%, 0, 0);
            transform: translate3d(-100%, 0, 0);
}
100% {
    -webkit-transform: translate3d(150%, 0, 0);
            transform: translate3d(150%, 0, 0);
}
}


@-webkit-keyframes hoverMove {
0% {
    -webkit-transform: translate3d(12px, 12px, 0);
            transform: translate3d(12px, 12px, 0);
}
100% {
    -webkit-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
}
}
@keyframes hoverMove {
0% {
    -webkit-transform: translate3d(12px, 12px, 0);
            transform: translate3d(12px, 12px, 0);
}
100% {
    -webkit-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
}
}

.spinner {
  margin: 100px auto;
  width: 20px;
  height: 20px;
  position: relative;
  top: 20%
}

.container1 > div, .container2 > div, .container3 > div {
  width: 6px;
  height: 6px;
  background-color: #333;

  border-radius: 100%;
  position: absolute;
  -webkit-animation: bouncedelay 1.2s infinite ease-in-out;
  animation: bouncedelay 1.2s infinite ease-in-out;
  -webkit-animation-fill-mode: both;
  animation-fill-mode: both;
}

.spinner .spinner-container {
  position: absolute;
  width: 100%;
  height: 100%;
}

.container2 {
  -webkit-transform: rotateZ(45deg);
  transform: rotateZ(45deg);
}

.container3 {
  -webkit-transform: rotateZ(90deg);
  transform: rotateZ(90deg);
}

.circle1 { top: 0; left: 0; }
.circle2 { top: 0; right: 0; }
.circle3 { right: 0; bottom: 0; }
.circle4 { left: 0; bottom: 0; }

.container2 .circle1 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}

.container3 .circle1 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

.container1 .circle2 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

.container2 .circle2 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}

.container3 .circle2 {
  -webkit-animation-delay: -0.7s;
  animation-delay: -0.7s;
}

.container1 .circle3 {
  -webkit-animation-delay: -0.6s;
  animation-delay: -0.6s;
}

.container2 .circle3 {
  -webkit-animation-delay: -0.5s;
  animation-delay: -0.5s;
}

.container3 .circle3 {
  -webkit-animation-delay: -0.4s;
  animation-delay: -0.4s;
}

.container1 .circle4 {
  -webkit-animation-delay: -0.3s;
  animation-delay: -0.3s;
}

.container2 .circle4 {
  -webkit-animation-delay: -0.2s;
  animation-delay: -0.2s;
}

.container3 .circle4 {
  -webkit-animation-delay: -0.1s;
  animation-delay: -0.1s;
}

@-webkit-keyframes bouncedelay {
  0%, 80%, 100% { -webkit-transform: scale(0.0) }
  40% { -webkit-transform: scale(1.0) }
}

@keyframes bouncedelay {
  0%, 80%, 100% {
    transform: scale(0.0);
    -webkit-transform: scale(0.0);
  } 40% {
    transform: scale(1.0);
    -webkit-transform: scale(1.0);
  }
}


@-webkit-keyframes roll {
0% {
    -webkit-transform: rotate(0);
            transform: rotate(0);
}
100% {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
}
}
@keyframes roll {
0% {
    -webkit-transform: rotate(0);
            transform: rotate(0);
}
100% {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
}
}

效果：

QQ20180412-155148.png