@uppy/core/src/supportsUploadProgress.js

// 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/
module.exports = function supportsUploadProgress (userAgent) {
  // Allow passing in userAgent for tests
  if (userAgent == null) {
    userAgent = typeof navigator !== 'undefined' ? navigator.userAgent : null
  }
  // 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]
  let [major, minor] = edgeVersion.split('.')
  major = parseInt(major, 10)
  minor = parseInt(minor, 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
}