css制作加载指示器

html结构

<div class="loader-inner line-spin-fade-loader">
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</div>

css代码

.ball-spin-fade-loader {
    position: relative;
}

.ball-spin-fade-loader>div:nth-child(1) {
    top: 25px;
    left: 0;
    -webkit-animation: ball-spin-fade-loader 1s 0s infinite linear;
    animation: ball-spin-fade-loader 1s 0s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(2) {
    top: 17.04545px;
    left: 17.04545px;
    -webkit-animation: ball-spin-fade-loader 1s 0.12s infinite linear;
    animation: ball-spin-fade-loader 1s 0.12s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(3) {
    top: 0;
    left: 25px;
    -webkit-animation: ball-spin-fade-loader 1s 0.24s infinite linear;
    animation: ball-spin-fade-loader 1s 0.24s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(4) {
    top: -17.04545px;
    left: 17.04545px;
    -webkit-animation: ball-spin-fade-loader 1s 0.36s infinite linear;
    animation: ball-spin-fade-loader 1s 0.36s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(5) {
    top: -25px;
    left: 0;
    -webkit-animation: ball-spin-fade-loader 1s 0.48s infinite linear;
    animation: ball-spin-fade-loader 1s 0.48s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(6) {
    top: -17.04545px;
    left: -17.04545px;
    -webkit-animation: ball-spin-fade-loader 1s 0.6s infinite linear;
    animation: ball-spin-fade-loader 1s 0.6s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(7) {
    top: 0;
    left: -25px;
    -webkit-animation: ball-spin-fade-loader 1s 0.72s infinite linear;
    animation: ball-spin-fade-loader 1s 0.72s infinite linear;
}

.ball-spin-fade-loader>div:nth-child(8) {
    top: 17.04545px;
    left: -17.04545px;
    -webkit-animation: ball-spin-fade-loader 1s 0.84s infinite linear;
    animation: ball-spin-fade-loader 1s 0.84s infinite linear;
}

.ball-spin-fade-loader>div {
    background-color: #279fcf;
    width: 15px;
    height: 15px;
    border-radius: 100%;
    margin: 2px;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
    position: absolute;
}

@-webkit-keyframes line-spin-fade-loader {
    50% {
        opacity: 0.3;
    }

    100% {
        opacity: 1;
    }
}

@keyframes line-spin-fade-loader {
    50% {
        opacity: 0.3;
    }

    100% {
        opacity: 1;
    }
}

.line-spin-fade-loader {
    position: relative;
}

.line-spin-fade-loader>div:nth-child(1) {
    top: 20px;
    left: 0;
    -webkit-animation: line-spin-fade-loader 1.2s 0.12s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.12s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(2) {
    top: 13.63636px;
    left: 13.63636px;
    -webkit-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    transform: rotate(-45deg);
    -webkit-animation: line-spin-fade-loader 1.2s 0.24s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.24s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(3) {
    top: 0;
    left: 20px;
    -webkit-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
    transform: rotate(90deg);
    -webkit-animation: line-spin-fade-loader 1.2s 0.36s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.36s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(4) {
    top: -13.63636px;
    left: 13.63636px;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
    -webkit-animation: line-spin-fade-loader 1.2s 0.48s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.48s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(5) {
    top: -20px;
    left: 0;
    -webkit-animation: line-spin-fade-loader 1.2s 0.6s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.6s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(6) {
    top: -13.63636px;
    left: -13.63636px;
    -webkit-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    transform: rotate(-45deg);
    -webkit-animation: line-spin-fade-loader 1.2s 0.72s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.72s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(7) {
    top: 0;
    left: -20px;
    -webkit-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
    transform: rotate(90deg);
    -webkit-animation: line-spin-fade-loader 1.2s 0.84s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.84s infinite ease-in-out;
}

.line-spin-fade-loader>div:nth-child(8) {
    top: 13.63636px;
    left: -13.63636px;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
    -webkit-animation: line-spin-fade-loader 1.2s 0.96s infinite ease-in-out;
    animation: line-spin-fade-loader 1.2s 0.96s infinite ease-in-out;
}

.line-spin-fade-loader>div {
    background-color: #279fcf;
    width: 4px;
    height: 35px;
    border-radius: 2px;
    margin: 2px;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
    position: absolute;
    width: 5px;
    height: 15px;
}

文章来源：https://blog.csdn.net/u012151556/article/details/53301605