Feature requests for ":matches-css"

[DandelionSprout]

Prerequisites

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• This is not a support issue or a question
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• I tried to reproduce the issue when...
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Description

I'm combining two feature requests into one, as I wish to become able to write entries to modify specific pre-existing CSS element values, à la fandom.com##body:matches-css(cursor: url*):style(cursor: auto). This would make it possible to write very good CSS-editing entries that'd make uBO's :style feature even more superior to the functionalities of privacy-scandal-struck CSS-editor-specific extensions like Stylish.

Request 1: Supporting wildcards in the :matches-css text selection, as it'd (among many other things) make it possible to target all uses of custom URL values, instead of one and one custom image at a time.

Request 2: Making it possible to combine :matches-css with :style.

A specific URL where the issue occurs

https://winx.fandom.com/wiki/Tecna.

Steps to Reproduce

1. Open the element picker.
2. Write ##body:matches-css(background-size: cover), and see that the picker does recognise such an element.
3. (In request 1) Write e.g. ##body:matches-css(background-size: *), ##body:matches-css(background-size: cov*) ##body:matches-css(/background-size:.*/), ##body:matches-css(/[background-size: ]*/) or ##body:matches-css(background-size:) (among others), and see that the picker doesn't recognise any of them.
4. (In request 2) Write ##body:matches-css(background-size: cover):style(background-size: unset), and see that the picker doesn't recognise it.

Expected behavior:

That the elements would've been hideable by uBO under such criteria.

Actual behavior:

(Covered by the reproduction steps.)

Your environment

• uBlock Origin version: uBO 1.18.16
• Browser Name and version: Vivaldi 2.3.1440.61 64-bit
• Operating System and version: Windows 10 October 2018 Update (Recentmost installed update: KB4495667)

[gwarser]

1. use regular expression, see example in https://github.com/gorhill/uBlock/wiki/Procedural-cosmetic-filters#subjectmatches-cssarg
2. duplicate of Combining procedural selector :has() and :style() #382

[DandelionSprout]

I suppose both of those links explains it. My fault.

And indeed it seems that writing à la ##body:matches-css(background-image: /url/) is exactly the kind of stuff I was looking for in Request 1 but which I somehow failed to see and try out.

[uBlock-user]

Duplicate of #382