Contact [email protected]

ExplainerNone

Specificationhttps://dom.spec.whatwg.org/#namespaces

Summary

The HTML parser has always (or for a long time) allowed elements and
attributes to have a wide variety of valid characters and names, but the
javascript DOM APIs to create the same elements and attributes are more
strict and don't match the parser. This change relaxes the validation of
the javascript DOM APIs to match the HTML parser. More context here:
https://github.com/whatwg/dom/issues/849 I don't anticipate any compat
issues from this change because all of the previously allowed
element/attribute names are still allowed with the new behavior.


WHATWG has merged the spec changes for this already:

- https://github.com/whatwg/dom/pull/1079

- https://github.com/whatwg/html/pull/7991

Blink componentBlink>DOM
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EDOM%22>

TAG reviewNone

TAG review statusNot applicable

Risks


Interoperability and Compatibility

I believe it is very likely that webkit and gecko will ship this change
after we do, so I believe that the interoperability and compat risks are
low.


*Gecko*: No signal - This spec PR lists gecko as an interested implementor,
so maybe firefox view is positive? https://github.com/whatwg/dom/pull/1079

*WebKit*: No signal

*Web developers*: Positive (
https://github.com/whatwg/dom/issues/849#issuecomment-2876716958)

*Other signals*:

Ergonomics

The validation of element and attribute names is fairly isolated and the
new validation logic does not have different complexity than the old logic.
The default usage of this API will not make it hard for chrome to maintain
good performance.


Activation

It will not be hard to developers to use this change immediately, and I
don't think we need outreach for it. It is more of a bug fix than a new
feature.


Security

https://github.com/whatwg/dom/issues/849#issuecomment-1090076902


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?

None


Debuggability

If an element or attribute name is not allowed, then just like with the old
logic an exception will be thrown explaining that the name is not valid.
There are no specialized DevTools features for this name validation, and I
don't think any DevTools changes are needed for this feature.


Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, ChromeOS, 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

https://github.com/web-platform-tests/wpt/pull/38503
https://chromium-review.googlesource.com/c/chromium/src/+/6570951
https://github.com/web-platform-tests/wpt/pull/52982
https://chromium-review.googlesource.com/c/chromium/src/+/6615057

Flag name on about://flagsNone

Finch feature nameRelaxDOMValidNames

Rollout plan
This seems fairly safe so I was going to go with "Will ship enabled for all
users," but there is no rush for this change so I am thinking that rolling
out via finch would be better just to be safe.

Requires code in //chrome?False

Tracking bughttps://issues.chromium.org/issues/40228234

MeasurementI didn't add UseCounters for this, and I don't think it is
necessary to track.

Estimated milestones

No milestones specified


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).
None

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/6278918763708416?gate=5097618073714688

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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