CSS Validator error in wp-includes/css/dist/block-library/style.min.css

[aurepons]

I found two css errors when validating:

background-color is invalid at
.wp-gs .wp-block-button__link:not(.has-background)

margin-right:none is invalid property at
.wp-block-buttons.alignright .wp-block-button

[audrasjb]

Hi @aurepons and welcome to WordPress Trac,

Thanks for opening this ticket! Seems legit to me.

I reported the margin-right: none issue upstream on Gutenberg GitHub repository: ​https://github.com/WordPress/gutenberg/pull/22583

[audrasjb]

Concerning the other error, the related CSS declaration looks good to me:

.wp-gs .wp-block-button__link:not(.has-background) {
    background-color: var(--wp-block-core-button--color--background, var(--wp-color--primary, #32373c)); 
}

I think the validator is mistaken.

[aurepons]

Thank you for your fast response, probably you are right, but would be nice that wordpress validates with standard W3C tools and this is the only file that fails, try it at ​http://jigsaw.w3.org/css-validator/

[audrasjb]

@aurepons Thanks for the reply :)
Yes, I tested it with the W3C validator on my side, but unless I'm mistaken, it looks like the first case is an error from the W3C validation tool itself.

The second error is going to be fixed in WP 5.5 :)

[aurepons]

Thank you very much ;-)

[ocean90]

See ​https://github.com/WordPress/gutenberg/pull/22583.