facebook/react — pull request #2413 by LeonFedotov (2014-10-27 17:18:32+00:00)
Title: Changing api documentation for jsx transformer

Hi in chrome debugger, the files that use sourcemaps from the transformer get "null" as the filename during debug, https://github.com/facebook/react/blob/master/main.js#L15 "sourceFilename" is used instead of "filename" to specify the filename in the sourcemap.