.loader {
    width: 100%;
    height: 4.8px;
    display: inline-block;
    position: relative;
    background: rgb(13, 110, 253);
    overflow: hidden;
}

    .loader::after {
        content: '';
        width: 192px;
        height: 4.8px;
        background: #FFF;
        position: absolute;
        top: 0;
        left: 0;
        box-sizing: border-box;
        animation: animloader 2s linear infinite;
    }

@keyframes animloader {
    0% {
        left: 0;
        transform: translateX(-100%);
    }

    100% {
        left: 100%;
        transform: translateX(0%);
    }
}