file is being assigned a //# sourceMappingURL but already has one

Question

I just notice Firefox console outputs the following error for every single .js/.coffee file in my project (even the packages).

-file- is being assigned a //# sou         


        

Answer 1

I have been working on a project for over a year now, I have never seen this message until roughly the last Firefox update.

I received it using jQuery 1.9.x, so I just updated my jQuery to 1.11.x and the error went away. I am now happy.

So, if you are using jQuery and see this Error/Warning, try updating your jQuery to the latest version.

Hope this helps someone.