.bar-spinner {
    height: 35px;
    background: 
    linear-gradient(90deg,#0001 33%,#0005 50%,#0001 66%)
    #f2f2f2;
    background-size:300% 100%;
    animation: l1 1s infinite linear;
 }
 
 @keyframes l1 {
    0% {background-position: right}
 }

 table.loading tbody {
    position: relative;
 }

 table.loading tbody:after {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.1);
    background-image: url('../img/table-loading.gif');
    background-position: center;
    background-repeat: no-repeat;
    background-size: 50px 50px;
    content: "";
 }