cssnano removes "all" attribute from css @media query -


i curious if cssnano media queries ok. in css file, have. 

@media , ( min-width: 600px) {}

after running css through cssnano, turns > 

@media ( min-width: 600px) {}

is safe use in production? can't seem find anywhere says not having "all" attribute makes browser default or if not having bad thing sending file production?

i'm author; yes, it's valid. i'll refer original issue in nutshell:

per spec (example 5):

i.e. these identical:

@media , (min-width:500px) { … } @media (min-width:500px) { … }

as these:

@media (orientation: portrait) { … } @media , (orientation: portrait) { … }

it seems me stripped...[snip]

https://github.com/ben-eb/cssnano/issues/215


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