.js-input-column.loader {
    position: relative;
}

.js-input-column.loader:after {
    position: absolute;
    content: '';
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 3px dotted black;
    top: 50%;
    left: -80px;
    translate: -50% -50%;
    animation: rotation 2000ms linear infinite;
}

@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}