let shim = {}; shim.isNode = () => { if (typeof process === 'undefined') return false; return process.title = 'node'; }; shim.isReactNative = () => { return !shim.isNode(); }; shim.fetch = typeof fetch !== 'undefined' ? fetch : null; shim.FormData = typeof FormData !== 'undefined' ? FormData : null; shim.fs = null; shim.FileApiDriverLocal = null; export { shim };