[css-multicol-1] column-rule-style: {none | hidden} forcing column-rule-width to 0

[kbabbitt]

While working on draft text for gap decorations, I noticed a minor inconsistency in the existing text for column rules in css-multicol-1.

Section 4.4 states that the computed value for column-rule-width is:

absolute length, snapped as a border width; 0 if the column rule style is none or hidden

However, Section 4.3, defining column-rule-style, states:

The none value forces the computed value of column-rule-width to be 0.

...and makes no mention of hidden.

Blink, Webkit, and Gecko all agree that column-rule-style: hidden results in the computed value of column-rule-width being set to 0. Test page: https://codepen.io/kevinbcmu/pen/qBeVyme

Should we update the text for column-rule-width to reflect this?

[kbabbitt]

Agenda+ to propose making the text consistently match what's shipped.

[fantasai]

Sounds like this would make it both match what's shipped and also match how borders work, so +1 from me and it seems obvious enough of a bugfix that I think an async resolution would be reasonable.

[rachelandrew]

+1 from me.

[astearns]

Does this need a resolution? The definition of hidden says that it's the same as none in https://www.w3.org/TR/css-backgrounds-3/#typedef-line-style

Perhaps it's merely editorial to make this explicit in the prose for column-rule-style

[kbabbitt]

Taking this as an editorial change works for me if the spec editors are happy with that outcome.
Created a PR here: #11262

[kbabbitt]

Thanks @rachelandrew! Closing as editorial.