@uppy/utils/lib/isDragDropSupported.js

Shared utility functions for Uppy Core and plugins maintained by the Uppy team.

/**
 * Checks if the browser supports Drag & Drop (not supported on mobile devices, for example).
 */
export default function isDragDropSupported() {
    if (typeof window === 'undefined') {
        return false;
    }
    const body = document.body;
    // sometimes happens in the wild: https://github.com/transloadit/uppy/issues/5953
    if (body == null || window == null) {
        return false;
    }
    if (!('draggable' in body) ||
        !('ondragstart' in body) ||
        !('ondrop' in body)) {
        return false;
    }
    if (!('FormData' in window)) {
        return false;
    }
    if (!('FileReader' in window)) {
        return false;
    }
    return true;
}