@uppy/utils/lib/getFileType.js

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

import getFileNameAndExtension from './getFileNameAndExtension.js';
import mimeTypes from './mimeTypes.js';
export default function getFileType(file) {
    if (file.type)
        return file.type;
    const fileExtension = file.name
        ? getFileNameAndExtension(file.name).extension?.toLowerCase()
        : null;
    if (fileExtension && fileExtension in mimeTypes) {
        // else, see if we can map extension to a mime type
        return mimeTypes[fileExtension];
    }
    // if all fails, fall back to a generic byte stream type
    return 'application/octet-stream';
}