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; shim.readLocalFileBase64 = (path) => { throw new Error('Not implemented'); } shim.uploadBlob = () => { throw new Error('Not implemented'); } shim.setInterval = function(fn, interval) { return setInterval(fn, interval); } shim.clearInterval = function(id) { return clearInterval(id); } shim.detectAndSetLocale = null; module.exports = { shim };