Intent to Implement and Ship: CSS margin-block and margin-inline shorthands

[Mats Palmgren]

Summary: The margin-block CSS property is a shorthand for the
margin-block-start/end properties (ditto -inline)

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1519944

Link to standard: https://drafts.csswg.org/css-logical/#propdef-margin-inline

Platform coverage: All platforms

Estimated or target release: Firefox 66

Preference behind which this will be implemented: None

Is this feature enabled by default in sandboxed iframes? Yes

DevTools bug: N/A, devtools support is included in the patch

Do other browser engines implement this?
https://wpt.fyi/results/css/css-logical/logical-box-margin.html
Blink appears to have implemented them behind a flag:
https://cs.chromium.org/chromium/src/third_party/blink/renderer/core/css/css_properties.json5?rcl=b166577f0820ba3f3aefe3c0fbe330c8e2f86dc9&l=4820-4831

web-platform-tests:
http://w3c-test.org/css/css-logical/logical-box-margin.html

Is this feature restricted to secure contexts? No


/Mats

[Mats Palmgren]