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[css-background] background shorthand and "/" slash syntax #18947

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karlcow opened this issue Sep 10, 2019 · 0 comments · Fixed by #18952
Closed

[css-background] background shorthand and "/" slash syntax #18947

karlcow opened this issue Sep 10, 2019 · 0 comments · Fixed by #18952

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@karlcow
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karlcow commented Sep 10, 2019

The CSS spec says:
cover attribute is allowed only if a position has been specified before hand.

<bg-layer> =    <bg-image> 
                     || <bg-position> [ / <bg-size> ]? 
                     || <repeat-style> 
                     || <attachment> 
                     || <box> 
                     || <box>

Currently Safari, Chrome on one side behaves differently than Firefox.
Chrome and Safari accepts this syntax and shows the image (not following the spec)

background: rgba(0,0,0,0) 0 url(…) / cover

Test: https://codepen.io/webcompat/pen/LYPLvow
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Add test for invalid background shorthand <bg-size> position.
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@karlcow