Handle window.location undefined

[daniel-shuy]

Fixes #25

window.location is undefined in React Native

[bluepnume]

Hi -- thanks for the fix, but isn't this already covered by isBrowser()?

[daniel-shuy]

No, isBrowser() only checks whether window is undefined, not window.location. React Native polyfills window, but not window.location (see https://github.com/facebook/react-native/blob/v0.63.3/Libraries/Core/setUpGlobals.js#L21-L23)

[daniel-shuy]

Or should I create a PR to update isBrowser() to check for window.location instead?

[bluepnume]

Gotcha. In that case would you mind making the fix in isBrowser() instead since the current implementation doesn't cover that react native case? Thanks!

[daniel-shuy]

Done (krakenjs/belter#11)