SourceMap warnings

[darrenklein]

Thank you very much for this extremely helpful library. I wanted to alert you to a non-critical issue that I noticed after installing the library in my React project (React version 16.0.0) -

In Chrome (version 63.0.3239.84), I'm getting the following warning:

DevTools failed to parse SourceMap: http://localhost:5000/js/isRequiredIf.js.map

and a slightly different variation in Firefox (version 57.0.3):

Source map error: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
Resource URL: http://localhost:5000/js/app.js
Source Map URL: isRequiredIf.js.map

No problems in Safari, though.

As far as I can tell, this is not affecting performance, but I thought you'd want to know.