Contact [email protected]

Explainerhttps://open-ui.org/components/accordion.explainer

Specificationhttps://github.com/whatwg/html/pull/9400

Summary

This feature adds the ability to construct exclusive accordions using a
sequence of HTML <details> elements. It adds a name attribute to the
<details> element. When this attribute is used, multiple <details> elements
that have the same name form a group. At most one element in the group can
be open at once.


Blink componentBlink>HTML>Details
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EHTML%3EDetails>

TAG reviewhttps://github.com/w3ctag/design-reviews/issues/866 (design
review)

TAG review statusIssues addressed

Risks


Interoperability and Compatibility



*Gecko*: Positive (https://github.com/mozilla/standards-positions/issues/831
)

*WebKit*: In development (
https://github.com/WebKit/standards-positions/issues/209) positive
standards position and code landed (although a little behind the most
recent changes to the proposal)

*Web developers*: No signals Got significant feedback from web developers
in https://github.com/openui/open-ui/issues/812 . See examples of use on
live sites in
https://open-ui.org/components/accordion.explainer/#developer-demand-for-exclusive-accordion

*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?

no


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

Flag name on chrome://flags

Finch feature namekAccordionPattern

Requires code in //chrome?False

Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1444057

Availability expectationHoping to get cross-browser adoption relatively
quickly (<12 months) given that it's a small feature that seems to be
widely supported.

Adoption expectationWider adoption may depend on also doing other changes,
like improved stylability of <details> and <summary> elements.

Non-OSS dependencies

Does the feature depend on any code or APIs outside the Chromium open
source repository and its open-source dependencies to function?
no

Estimated milestones
Shipping on desktop 120
Shipping on Android 120
Shipping on WebView 120

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).
There may still be some small changes as part of the process of getting
https://github.com/whatwg/html/pull/9400 finished, but I hope to implement
those before shipping (at least those that happen soon).

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/6710427028815872

Links to previous Intent discussionsIntent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/Q1OX6ZA_aaE/m/ALwkAOfHAwAJ

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

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