qrcode/lib/can-promise.js

QRCode / 2d Barcode api with both server side and client side support using canvas

// can-promise has a crash in some versions of react native that dont have
// standard global objects
// https://github.com/soldair/node-qrcode/issues/157

module.exports = function () {
  return typeof Promise === 'function' && Promise.prototype && Promise.prototype.then
}