`csscomb`,专门干这个的。可以看看。 [https://github.com/csscomb/csscomb.js/tree/ce7ad831bd9b7fddb660c59afbbaf183c98d6ca7](https://link.segmentfault.com/?enc=n4qDBLkd560rRTVOsmrGTw%3D%3D.UAbsKg80RjM1fArqR2Ep%2Bl4bmOC9AlAhlx05j%2FI6EVQm%2BHihWY5pU5novmocKn5kgK1X244IYTeIMXRSDy3amc44d5hGav4q9Go%2FzOMGRtPEYKYqG4R%2F%2FNCNfEy37z4g)