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eptrainingeptraining 

lightningStylesheets="true" in Winter'18 (sandboxes) issue

I've been using lightningStylesheets="true" on all my VF pages (in production) from Feb 2018 and everything worked perfectly fine. Today I've just noted on Winter'18 sanboxes that all Visualforce pages ignore this attribute and display worse than initially in classic. Does anyone encountered the same issue? What to expect  when production will be updated to Winter'18?

Thank you very much.
NagendraNagendra (Salesforce Developers) 
Hi,

If you are using lightningStylesheets = "true" and the environment that it is not working is in Winter 18 it is a 500 error on Salesforces part. If you inspect the browser when you load the visual force page and look at the console you will see a 500 error relating to the CSS.

Please let us know if you have any further queries.

Happy to help further.

Thanks,
Nagendra
eptrainingeptraining
Thank you for your answer. In the meantime I 've been notified about Lightning style sheet for VF page not working as expected (https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsuccess.salesforce.com%2Fissues_view%3Fid%3Da1p3A00000031OPQAY&data=02%7C01%7Cepoli%40hyperwallet.com%7C32c51ab39b87400b882808d62997408e%7C2b62e490d76648e682070f1e722c39c5%7C0%7C0%7C636742126929992102&sdata=4EAn3qWLf87U%2BXkhIwJcItQgPnNeun1os2iOPlCYFXw%3D&reserved=0). Problem is fixed at least on some sandboxes. (Release in progress Winter '18 Patch 7.2)