LGTM1 - seems like an obvious interop win.
On 7/12/23 4:31 AM, Frédéric Wang wrote:
Hello,
This is actually an intent to ship (sorry for sending email with the
wrong title).
To summarize a bit conversations, columnspan/rowspan was something
that was requested by web developers and is used in existing
documents. We cannot just say "use CSS instead" as they are no
equivalent properties.
Initially, we wanted to have this in the initial MathML implementation
but things were postponed because we needed to decide between "make
things more compatible with HTML" (i.e. colspan/rowspan names) or
"make things backward compatible with MathML3" (i.e.
columnspan/rowspan names). Given the latter is already implemented by
Firefox/WebKit and used in existing documents and tools we decided to
go with the latter (Mozilla also positioned negatively about changing
the name).
-------------
Contact emails
fw...@chromium.org
Explainer
None
Specification
https://w3c.github.io/mathml-core/#entry-in-table-or-matrix-mtd
Summary
Implement attributes to specify the number of columns and rows that a
MathML table cell is to span. This is similar to HTML colspan/rowspan
attributes and does not have equivalent CSS properties.
Blink component
Blink>MathML
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink>MathML>
TAG review
None
TAG review status
Not applicable
Risks
Interoperability and Compatibility
/Gecko/: Shipped/Shipping
(https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtd#browser_compatibility)
Mozilla positioned negatively about renaming
https://github.com/mozilla/standards-positions/issues/74
(Note: this should be
https://github.com/mozilla/standards-positions/issues/743)
/WebKit/: Shipped/Shipping
(https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtd#browser_compatibility)
/Web developers/: Positive
/Other signals/:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
Debuggability
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
Yes
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
Tests are added in
https://chromium-review.googlesource.com/c/chromium/src/+/4061476
However, advanced parsing such as checking the max limits 1000 and
65534 defined in HTML is a bit tedious as MathML does not have an IDL
for tables yet (
https://github.com/w3c/mathml-core/issues/166#issuecomment-1411721093
<https://github.com/w3c/mathml-core/issues/166#issuecomment-1411721093><https://github.com/w3c/mathml-core/issues/166#issuecomment-1411721093>
) so for now they are written as internal tests.
Flag name on chrome://flags
Finch feature name
Non-finch justification
None
Requires code in //chrome?
False
Estimated milestones
Shipping on desktop 117
Shipping on Android 117
Shipping on WebView 117
Anticipated spec changes
Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github
issues in the project for the feature specification) whose resolution
may introduce web compat/interop risk (e.g., changing to naming or
structure of the API in a non-backward-compatible way).
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5157467960377344
Links to previous Intent discussions
Intent to Experiment:
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/2603ac64-2367-434f-cee3-42b3d9111639%40igalia.com
This intent message was generated by Chrome Platform Status
<https://chromestatus.com>.
--
Frédéric Wang
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