Does source-maps in style tags work?
/*@ sourceMappingURL= is the old syntax, /*# sourceMappingURL= should be used instead.
The new Syntax is implemented in all major browser source and Internet explorer 11+ source.
Chrome dev tools
- Open Developer Tools F12
- Open Settings F1.
- Click "Enable CSS source maps" checkbox
Firefox dev tools
- Open Developer Tools F12
- Open Toolbar Options (Cog on right).
- Click "Show original sources" checkbox
Internet Explorer dev tools
- Open Developer Tools F12
- Open Debugger panel Ctrl+3
- click the last icon on the right
Safari dev tools & Firebug
- enabled by default.