feat(mosaic): animate contact list rows and the primary badge in the user profile by maxyinger · Pull Request #10005 · clerk/javascript

maxyinger · 2026-09-30T22:18:15Z

Description

Emails and phone numbers in the user profile's account section keep the order they were first shown in while the panel is mounted, and every change to the list is animated.

Rows. Each row sits in a grid slot (the li) whose single track transitions between 1fr and 0fr, on --cl-duration-slower and --cl-ease-in-out both ways. Adding a row expands its slot and removing one collapses it, with the row's content fading in at the top of the clip and a static fade on the bottom edge, so the separator is visible for the whole transition and a focused trigger's outline clears the fade. Every row owns its separator, with the body's own border zeroed, so the first row's exit does not double the line. usePresenceList keeps a removed row mounted until its exit finishes. Rows added or removed by a dialog wait out its exit before they move.

Order. Rows do not reorder. useStableOrder keeps the first-seen order, appending new rows and dropping removed ones, even when the model sorts the new primary to the top. Setting a primary therefore moves the badge rather than the rows; the empty-state row collapses the same way when the first item arrives.

Badge and pending state. A set-primary request marks its row busy for as long as the request or its indicator is showing. Once it outlasts the spin-delay threshold, a named spinner fades in where the badge will land, and the badge change waits until it has shown for its minimum. The old badge leaves before the new one arrives; badge and spinner share one slot and one transition, with opacity, scale, and a slight blur at their ends, and the badge translates half a rem toward the row the primary moves to or arrives from.

Reduced motion is a cut everywhere.

usePresenceList and useStableOrder join the primitives' hooks, and the email and phone rows share a useContactList hook for the stable order, pending state, and removal focus fallback. The model memoizes its email and phone lists.

The motion skill reference gains a "Rows in a list" subsection under the expand/collapse recipe and a "Small elements: pills, badges, indicators" section covering the delays, blur, shared slot, direction, and pending-state patterns, with the tag input's tags and SubmitButton's spinner named as the next adopters. The "Multiple accounts" story starts with five emails and its set-primary request resolves after a short delay; a new "Set primary pending" story uses a slow request to show the spinner.

Checklist

pnpm test runs as expected.
pnpm build runs as expected.
(If applicable) JSDoc comments have been added or updated for any package exports
(If applicable) Documentation has been updated

Type of change

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vercel · 2026-09-30T22:18:18Z

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changeset-bot · 2026-09-30T22:18:21Z

🦋 Changeset detected

Latest commit: c795d25

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coderabbitai · 2026-09-30T22:18:24Z

📝 Walkthrough

Walkthrough

The changes add hooks for stable item ordering and exit-aware presence. User-profile contact lists use these hooks to animate row entry and removal, preserve row order during primary updates, and show delayed pending indicators. Tests cover these behaviors. Stories demonstrate delayed primary updates, and the motion reference documents the transition patterns.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Suggested reviewers: alexcarpenter

Merge Risk: 🟡 Moderate · up to c795d

Add the Mosaic changeset before merging; otherwise the required CI check fails for this PR.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 8.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 16 files. (1 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the main change: animated contact-list rows and the primary badge in the user profile.
Description check	✅ Passed	The description explains the contact-list animations, stable ordering, pending state, reduced-motion behavior, and related documentation and story updates.

Full details: Docstring Coverage

Explanation

Docstring coverage is 8.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 16 files. (1 skipped: 1 unsupported.)

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commit: c795d25

maxyinger · 2026-10-02T23:29:37Z

Need to do a follow up version here that:

keeps enter and exit expand/collapse animations
stable email order while panel is mounted
remove re-order anim and try out other primary email setting approaches

Emails and phone numbers in the account section keep the order they were first shown in while the panel is mounted. A new row expands into the list and a removed row collapses out of it, each as a grid slot whose track transitions between 1fr and 0fr with the content fading inside a clip layer anchored to the top. Setting a primary moves the badge, which enters and exits on the motion rules, rather than the rows. A set-primary request marks its row busy; once it outlasts a short delay the rows ride the shared loading wave and the badge change waits for the pulse to end. Under reduced motion every change is a cut. Adds usePresenceList and useStableOrder to the primitives. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

…ence the badge The loading wave is replaced by a named spinner that fades in where the badge will land once the request outlasts a short delay, and the badge and spinner share one slot and one transition, with a small blur at their start and end. The new badge enters after the old one has left. Rows added or removed by a dialog wait out its exit before they move. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

… focus ring The badge translates a quarter rem toward the row the primary moves to, or arrives from, with its scale pivoting past the edge it travels through, and both badge and spinner blur by a pixel at their ends. The row's clip layer leaves room for a focused control's outline. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

…alues Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

The empty-state row collapses when the first item is added instead of vanishing, the badge no longer animates in on first load, every row owns its separator with the body's border zeroed so the first row's exit does not double the line, the bottom mask leaves room for a focus ring, and a row stays busy while its pending indicator is held. The content fade drops its scale, the row drops its unused pending attribute, and the badge and spinner share one slot item. The email and phone rows share a hook for the stable order, pending state, and removal fallback, and the model memoizes its lists. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

maxyinger · 2026-10-06T20:10:44Z

+- **The entering track starts from `@starting-style`**, not `data-starting-style`
+  (StyleX 0.19 compiles the key). The attribute is released from a passive effect a
+  frame after commit, and a track that starts a frame late is visible when another
+  row is collapsing at the same time. Keep the hook's inline `transition: none` off
+  the slot, and apply the `@starting-style` variant only to rows mounted after the
+  list's first render, or the list expands from nothing on load.


Is this needed anymore now that we don't have rows entering/exiting at the same time. If we could move back to the convention of data-starting-style that would be preferred

Agreed, back to data-starting-style in c795d25; the @starting-style variant and its note are gone.

maxyinger · 2026-10-06T20:13:02Z

+- **Reduced motion is a cut in one commit.** Every transition off, every value at
+  rest, and the slot `display: none` as soon as it carries `data-closed`. Without
+  that rule the incoming row mounts a commit before the outgoing one is unmounted and
+  both show for a frame.


we should still show no motion here, but I believe this was more of an issue when we had rows entering and exiting at the same time. we no longer run into this scenario, so I'm not sure if this is needed

Dropped the display: none rule in c795d25. Reduced motion is now just the transitions being off; useTransition unmounts the row as soon as it finds nothing to wait for.

maxyinger · 2026-10-06T20:13:39Z

+with `scale(0.9 → 1)` on `--cl-ease-default`, `fast` out on `--cl-ease-exit`),
+rather than moving rows past each other. A reorder was built and dropped: a row
+that collapses in one place and expands in another reads as a swap, not travel.


Suggested change

with `scale(0.9 → 1)` on `--cl-ease-default`, `fast` out on `--cl-ease-exit`),

rather than moving rows past each other. A reorder was built and dropped: a row

that collapses in one place and expands in another reads as a swap, not travel.

with `scale(0.9 → 1)` on `--cl-ease-default`, `fast` out on `--cl-ease-exit`),

rather than moving rows past each other.

we don't need old implementation details in here. omitted them in the comment above

Applied in c795d25.

maxyinger · 2026-10-06T20:15:29Z

+**A slight blur, `blur(1px)`, at both ends.** Add `filter` to the transition list,
+on `--cl-ease-enter` in and `--cl-ease-exit` out, and drop it to `blur(0)` under
+reduced motion with the scale. It reads as the pill resolving into place rather than
+switching on. 2px was tried and was too much on a pill: the text smeared for most of
+the fade. The rule of thumb is the blur radius is about a tenth of the element's
+height, floored at a pixel.


Suggested change

**A slight blur, `blur(1px)`, at both ends.** Add `filter` to the transition list,

on `--cl-ease-enter` in and `--cl-ease-exit` out, and drop it to `blur(0)` under

reduced motion with the scale. It reads as the pill resolving into place rather than

switching on. 2px was tried and was too much on a pill: the text smeared for most of

the fade. The rule of thumb is the blur radius is about a tenth of the element's

height, floored at a pixel.

**A slight blur, `blur(1px)`, at both ends.** Add `filter` to the transition list,

on `--cl-ease-enter` in and `--cl-ease-exit` out, and drop it to `blur(0)` under

reduced motion with the scale. It reads as the pill resolving into place rather than

switching on.

we don't need previous exploration details in here

Applied in c795d25.

maxyinger · 2026-10-06T20:16:53Z

+**Direction, when the element travels between places.** If a thing leaves one spot
+and reappears in another, let both halves say which way: the leaving element exits
+toward where the new one appears and the arriving one enters from where the old one
+was, through a small `translate` along the move. The contact badge, a 20px pill
+moving between 60px rows, uses half a rem. Keep the scale's origin at center: pushing
+it past the edge the element travels through to add an arc was tried and read as
+dramatic at this size. Set the direction through a custom property from a dynamic
+style, so one transition serves every direction.


this seems contact list pill specific. ie we don't need this on elements using layout animations.

Moved out of the general section in c795d25. The direction note now lives only with the contact rows' badge, where it applies.

maxyinger · 2026-10-06T20:18:53Z

+**A pending state shows where its outcome will land.** Mark the container busy at
+once, and once the request outlasts `useSpinDelay`'s threshold, fade a small named
+`Spinner` (`role='progressbar'`) into the slot the result will take. Hold the result
+until the spinner has shown for its minimum, then let the spinner leave with the old
+state and the new state arrive after its `fast` delay. A page-wide pulse on the
+surrounding rows was tried first and dropped: it read as the list reloading, not as
+one thing changing.


Suggested change

**A pending state shows where its outcome will land.** Mark the container busy at

once, and once the request outlasts `useSpinDelay`'s threshold, fade a small named

`Spinner` (`role='progressbar'`) into the slot the result will take. Hold the result

until the spinner has shown for its minimum, then let the spinner leave with the old

state and the new state arrive after its `fast` delay. A page-wide pulse on the

surrounding rows was tried first and dropped: it read as the list reloading, not as

one thing changing.

**A pending state shows where its outcome will land.** Mark the container busy at

once, and once the request outlasts `useSpinDelay`'s threshold, fade a small named

`Spinner` (`role='progressbar'`) into the slot the result will take. Hold the result

until the spinner has shown for its minimum, then let the spinner leave with the old

state and the new state arrive after its `fast` delay.

don't keep outdated implementation details in here. we only need these to describe the current ideal behavior

Applied in c795d25.

… motion notes The entering track takes its start from data-starting-style like every other transition, and reduced motion relies on the transitions being off rather than hiding a closing slot. The motion reference drops the exploration history and keeps the badge's direction note with the rows. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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🟡 Minor · Add a minor changeset for @clerk/mosaic. · contact-list-rows.md:1-2

.changeset/contact-list-rows.md:1-2
📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Add a minor changeset for @clerk/mosaic.

This PR changes Mosaic source and adds exports, but this file declares no package bump. For non-draft PRs outside the bot bypass, the Require Changeset CI step runs pnpm changeset status --since=origin/main. The missing entry makes that check fail and blocks the PR. Add the package entry:
Suggested fix
 ---
+'@clerk/mosaic': minor
 ---
+
+Add contact-list row support and presence/order hooks.
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Review comment at @.changeset/contact-list-rows.md around lines 1 - 2:
Populate the empty contact-list-rows changeset with a minor release entry for
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.claude/skills/mosaic/references/motion.md
packages/mosaic/src/features/user-profile/__tests__/user-profile-contact-list-row.view.test.tsx
packages/mosaic/src/features/user-profile/user-profile-account-section/user-profile-account-section.styles.ts
packages/mosaic/src/features/user-profile/user-profile-account-section/user-profile-contact-list-row.view.tsx

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github-actions Bot added the mosaic label Sep 30, 2026

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maxyinger force-pushed the contact-list-grid-rows branch from 4eb30c7 to 1e73fb9 Compare October 5, 2026 20:57

maxyinger changed the base branch from main to section-skeletons October 5, 2026 20:57

maxyinger changed the title ~~feat(mosaic): animate contact list reorders in the user profile~~ feat(mosaic): animate contact list rows in the user profile Oct 5, 2026

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maxyinger and others added 3 commits October 5, 2026 15:39

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maxyinger changed the base branch from section-skeletons to main October 5, 2026 21:40

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docs(mosaic): add small-element motion notes to the motion skill

6c01b30

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

vercel Bot deployed to Preview – clerk-js-sandbox October 5, 2026 21:44 View deployment

docs(mosaic): note that spinners take the small-element motion rules

5305c50

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

vercel Bot deployed to Preview – clerk-js-sandbox October 5, 2026 21:45 View deployment

docs(mosaic): keep badge direction as a principle rather than fixed v…

b48457d

…alues Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

vercel Bot deployed to Preview – clerk-js-sandbox October 5, 2026 21:46 View deployment

maxyinger changed the title ~~feat(mosaic): animate contact list rows in the user profile~~ feat(mosaic): animate contact list rows and the primary badge in the user profile Oct 5, 2026

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refactor(mosaic): drop the primary badge's directional travel

4d7c777

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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fix(mosaic): render first-load contact rows without their entering state

c71f84f

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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feat(mosaic): translate the primary badge toward the row it moves to

26b57d6

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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