Border module includes invalid outline properties

[nsaunders]

MDN's border-style documentation, as an example, shows "constituent properties" that allow a unique border to be applied to each side of an element. However, this does not seem to be the case for outlines: Notice, for example, how outline-style has no constituent properties listed. Indeed, my own testing suggests that outline properties can't be assigned to each side of an element independently: For example, outline-top-color yields an "unsupported property" warning in Safari:

[turion]

Ok, so outlineTopColor and similar functions should be removed?

[nsaunders]

@turion that is correct. These are the only outline functions that produce valid CSS:

• outline
• outlineColor
• outlineStyle
• outlineWidth
• outlineOffset

So these should be removed:

• outlineTop
• outlineRight
• outlineBottom
• outlineLeft
• outlineColor4
• outlineTopColor
• outlineRightColor
• outlineBottomColor
• outlineLeftColor
• outlineStyle4
• outlineTopStyle
• outlineRightStyle
• outlineBottomStyle
• outlineLeftStyle
• outlineWidth4
• outlineTopWidth
• outlineRightWidth
• outlineBottomWidth
• outlineLeftWidth

[github-actions]

This issue has not seen any activity in a long time. If no further activity occurs, it will be closed after ten weeks.

[turion]

PRs welcome to this issue :)