CSS WG Blog Minutes Paris F2F 2015-08-25 Part I: CSS C…

Minutes Paris F2F 2015-08-25 Part I: CSS Cascade, CSS Fragmentations, CSS Animations, CSS Text, TPAC Japanese Industry Meet-up, Flexbox, Grid/Flex Percentages, Testing

CSS Cascade

• Resolved: Publish a new WD for CSS Cascade
• Pending any comments, the authors will ask for CR in four weeks.

Full Minutes || Spec Referenced

CSS Fragmentation

• Resolved: Drop any and always from level 3 of Fragmentation
• Resolved: Drop break-before and break-after from Multicol and reference fragmentation definitions and republish as CR
• Once the above resolution is addressed and feedback on a remaining issue is received, the authors will ask the group for CR.

Full Minutes || Spec Referenced: Fragmentation, Multicol

CSS Animations

• dbaron will review the proposal on keyframe interaction

Full Minutes || Spec Referenced

CSS Text

• Control Character Status Update: the plan is still to have the change implemented by TPAC, but status of fixes is unknown.

Full Minutes || Spec Referenced

TPAC Japanese Industry Meet-up

• Lots of members of the group were interested in attending a meet-up with individuals interested in CSS in Japan around the time of TPAC.
• The options given were have a meeting on the Sunday before TPAC (which would allow more time, but would exclude some people that already made travel plans), Monday evening after the meeting (which would give a limited amount of time, especially if it’s not catered), and Wednesday (which would keep people out of the plenary session).
• Hiroshi-san will speak to the community and get back to the group with their preference.

Full Minutes

Flexbox

• Resolved: Don’t include flex-basis in intrinsic size calculations because that most closely matches existing behavior
• Issue #3 (Can percentages resolve given min-size: auto?) will be resolved by getting a few implementors to talk together and determine which solution they’re converging toward.
• Resolved: Just blockify the children of flex and grid containers. Don’t do anonymous box fix-up. (issue #6)

Full Minutes || Spec Referenced

Grid/Flex Percentages

• The group tried to work through how vertical percentage margins and paddings are defined.
  • Note: Top and bottom margins in CSS have traditionally resolved against the containing block width instead of its height, which has some useful effects but is generally surprising. Existing layout modes must of course continue to do so.
  • The discussion came down to three potential solutions:
    1. Always resolve percents against the width.
    2. Grid and flex resolve against height, and abspos items always resolve against the width.
    3. Grid and flex, including their abspos items, resolve against the height. Abspos elsewhere continue to resolve against the width.
  • In a straw poll the group was pretty evenly divided between options 1 and 3.
  • Microsoft would object to option 1 and Google to option 3, so the discussion reached an impasse and will be continued privately during the F2F in hopes of reaching a conclusion.

Full Minutes || Specs Referenced: Flexbox, Grid

Testing

• Resolved: Down-level tests (e.g. CSS2.1 color tests) should be updated to not fail on higher-level implementations (e.g. CSS4 color implementations), but should also leave the old pass conditions intact so that down-level clients can still pass the tests for the older featureset.
• It was noted that CSS reftests have a “match at least one of these references” feature, so this can be accommodated by linking two correct-rendering references instead of just one.

Full Minutes

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