Check for Node’s fs and path before trying to use them#339

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GeoffreyBooth wants to merge 3 commits intozaach:masterfrom GeoffreyBooth:fix-commonjs-detection

+6-1

Commits on Jan 21, 2017

Improve test for CommonJS environment, to not be fooled by a browser environment that happens to have require and exports defined as globals
GeoffreyBooth
committed
Actually, rather than test for Node, let’s specifically check that require(‘fs’) returns something before we try to use it
GeoffreyBooth
committed

Commits on Jan 22, 2017

Set the fallback value of source to an empty string, which is parseable, instead of null, which is not.
GeoffreyBooth
committed