Autoprefixer: Check -webkit-background-clip again

[ai]

https://drafts.csswg.org/css-backgrounds-4/#valdef-background-clip-text

[AmeliaBR]

Some comments:

• right now, all browsers that support background-clip: text (aka, Firefox and Edge) also support -webkit-background-clip: text
• other browsers (Blink and WebKit) only support the -webkit- version
• there are no other prefixes that I know of that include the text value
• it is usually used in combination with -webkit-text-fill-color in order to coordinate styles to only apply in browsers that support. There is not yet support for an unprefixed version of this property, although a standard fill-color is proposed.

But prefixes are ugly, and a dev working on Firefox or Edge as their main browser currently needs to remember to add in the prefixes for Chrome & Safari etc.

---

Possibly relevant usage stats from Microsoft's analytics:

• -webkit-background-clip: text is served to Chrome by approximately 0.03% of pages (763/2,354,088)
• background-clip: text is computed by Firefox / Edge (meaning they get served it either prefixed or un-prefixed: they treat the prefix as a shorthand for the unprefixed, and the MS data doesn't record shorthands, only computed values) on approximately 0.02% of pages (429 or 488 /2,354,088)

Which tells me that the number of sites using browser sniffing or CSS selector hacks to avoid sending -webkit- properties to Firefox and Edge is greater than the number of sites using background-clip: text without prefixes.

[ai]

Main problems right now:

1. We don’t have prefix data on Can I Use.
2. We still need prefix for -webkit-text-fill-color.

Right now I am thinking that we should keep -webkit- prefix. If somebody really wants to remove this prefix, add data to Can I Use ;).

[ai]

Closing since nobody added data to Can I Use

[sombreroEnPuntas]

@ai
Is this closed because it was fixed?
caniuse says to use the prefix: https://caniuse.com/#search=background-clip

I am not getting it, and have to manually add it :o

[ai]

@sombreroEnPuntas it was closed because no one decided to add prefix data to Can I Use. So seems like it is not necessary.

Right now Can I Use show prefix only in comments. But we need to show it in versions blocks. If you want t have this feature in Autoprefixer, maybe you can create a separated css-blackground-clip data for Can I Use.

[sombreroEnPuntas]

I see. I actually tried to understand the format on their repo, but don't get it :s
Not sure how to move the prefix from the comments to version blocks

[ai]

@sombreroEnPuntas

1. You need to create new file in features-json/
2. Here is fields description https://github.com/Fyrd/caniuse/blob/master/CONTRIBUTING.md

[ai]

Done 73c7b6a

[ai]

Released in 9.1

[sombreroEnPuntas]

Awesome!

Out of curiosity... can you point me to the commit on caniuse that added the prefixing options?

[ai]

It is closed because it was fixed in the master. I will release the fix in next caniuse-db release.