Properly handle alpha units

Question

Properly handle alpha units

nex3 opened this issue 10 years ago · comments

Natalie Weizenbaum commented 10 years ago

Currently rgba() and hsla() completely ignore units on the $alpha argument. They should interpret percentages per spec and fail for any other unit.

Natalie Weizenbaum · Answer 1 · Fri Jul 13 2018 10:31:48 GMT+0800 (China Standard Time)

This is handled correctly by Dart Sass, but it looks like it's still marked as TODO for LibSass.

@xzyfer Is there an issue tracking this on the LibSass side yet?

Prakhar Pal · Answer 2 · Thu Sep 27 2018 14:18:39 GMT+0800 (China Standard Time)

The spec at http://dev.w3.org/csswg/css-color/#typedef-alpha-value says that percentages(0-100%) and number(0-1) are allowed for alpha argument.
My understanding from issue description is that it should fail when anything other than % are given as argument. So,
.card{ color: rgba(255,255,255,0.5); }
should fail, but
.card{ color: rgba(255,255,255,50%); }
should pass? Kindly clarify.

Natalie Weizenbaum · Answer 3 · Thu Sep 27 2018 20:29:26 GMT+0800 (China Standard Time)

@lawki These functions are intended to allow unitless numbers between 0 and 1 as well.

Prakhar Pal · Answer 4 · Fri Sep 28 2018 13:34:57 GMT+0800 (China Standard Time)

Got it, thanks.

Natalie Weizenbaum · Answer 5 · Tue Oct 27 2020 07:48:16 GMT+0800 (China Standard Time)

Closing this out because LibSass is now deprecated and we aren't expecting to add any additional features to it.