drag-drop-polyfill/drag-drop-polyfill.css

Polyfill for making HTML5 drag and drop possible in all browsers.

.dnd-poly-drag-image {
    opacity: .5 !important;
}

.dnd-poly-drag-image.dnd-poly-snapback {
    transition-property: transform, -webkit-transform !important;
    transition-duration: 250ms !important;
    transition-timing-function: ease-out !important;
}