@uppy/core/lib/supportsUploadProgress.js

Core module for the extensible JavaScript file upload widget with support for drag&drop, resumable uploads, previews, restrictions, file processing/encoding, remote providers like Instagram, Dropbox, Google Drive, S3 and more :dog:

// Edge 15.x does not fire 'progress' events on uploads.
// See https://github.com/transloadit/uppy/issues/945
// And https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/12224510/
export default function supportsUploadProgress(userAgent) {
    // Allow passing in userAgent for tests
    if (userAgent == null && typeof navigator !== 'undefined') {
        userAgent = navigator.userAgent;
    }
    // Assume it works because basically everything supports progress events.
    if (!userAgent)
        return true;
    const m = /Edge\/(\d+\.\d+)/.exec(userAgent);
    if (!m)
        return true;
    const edgeVersion = m[1];
    const version = edgeVersion.split('.', 2);
    const major = parseInt(version[0], 10);
    const minor = parseInt(version[1], 10);
    // Worked before:
    // Edge 40.15063.0.0
    // Microsoft EdgeHTML 15.15063
    if (major < 15 || (major === 15 && minor < 15063)) {
        return true;
    }
    // Fixed in:
    // Microsoft EdgeHTML 18.18218
    if (major > 18 || (major === 18 && minor >= 18218)) {
        return true;
    }
    // other versions don't work.
    return false;
}