export function isDoNotTrackEnabled()

in src/amo/tracking.js [56:79]

• 15 lines of code
• 7 McCabe index (conditional complexity)

export function isDoNotTrackEnabled({
  _log = log,
  // The type above is correct but Flow complains about `Navigator` being
  // incompatible with `null`, so $FlowIgnore.
  _navigator = typeof navigator !== 'undefined' ? navigator : null,
  _window = typeof window !== 'undefined' ? window : null,
}: IsDoNoTrackEnabledParams = {}): boolean {
  if (!_navigator || !_window) {
    return false;
  }

  // We ignore things like `msDoNotTrack` because they are for older,
  // unsupported browsers and don't really respect the DNT spec. This
  // covers new versions of IE/Edge, Firefox from 32+, Chrome, Safari, and
  // any browsers built on these stacks (Chromium, Tor Browser, etc.).
  const dnt = _navigator.doNotTrack || _window.doNotTrack;
  if (dnt === '1') {
    _log.info('Do Not Track is enabled');
    return true;
  }

  // Known DNT values not set, so we will assume it's off.
  return false;
}