一、SVG Loading

<div style="width:40px;height: 40px;background: #eee;">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid" class="lds-ellipsis" style="background: rgba(0, 0, 0, 0) none repeat scroll 0% 0%;">
        <!--circle(cx="16",cy="50",r="10")-->
        <circle cx="16" cy="50" r="10" fill="#fff">
            <animate attributeName="r" values="10;0;0;0;0" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="0s"></animate>
            <animate attributeName="cx" values="84;84;84;84;84" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="0s"></animate>
        </circle>
        <circle cx="16" cy="50" r="10" fill="#fff">
            <animate attributeName="r" values="0;10;10;10;0" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="-0.5s"></animate>
            <animate attributeName="cx" values="16;16;50;84;84" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="-0.5s"></animate>
        </circle>
        <circle cx="16" cy="50" r="10" fill="#fff">
            <animate attributeName="r" values="0;10;10;10;0" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="-0.25s"></animate>
            <animate attributeName="cx" values="16;16;50;84;84" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="-0.25s"></animate>
        </circle>
        <circle cx="16" cy="50" r="10" fill="#fff">
            <animate attributeName="r" values="0;10;10;10;0" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="0s"></animate>
            <animate attributeName="cx" values="16;16;50;84;84" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="0s"></animate>
        </circle>
        <circle cx="16" cy="50" r="10" fill="#fff">
            <animate attributeName="r" values="0;0;10;10;10" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="0s"></animate>
            <animate attributeName="cx" values="16;16;16;50;84" keyTimes="0;0.25;0.5;0.75;1" keySplines="0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1;0 0.5 0.5 1" calcMode="spline" dur="1s" repeatCount="indefinite" begin="0s"></animate>
        </circle>
    </svg>
</div>