fix(event-listener): balance hydration ids for createEventListener by Jeysef · Pull Request #1048 · solidjs-community/solid-primitives · GitHub

Fixes hydration-id shift when createEventListener is used inside SSR-hydrated components (e.g. Kobalte TabsList via createSelectableCollection).

Problem

createEventListener returned early on the server (if (isServer) return) creating 0 owners, but created one createEffect/createRenderEffect owner on the client. In Solid 2.0 strict hydration every non-transparent owner consumes a child-id slot, so every sibling rendered after the listener shifted its hydration id by +1:

Hydration key miss for "...r00026" (template: <div>)
Hydration completed with 3 unclaimed server-rendered node(s):
  <div _hk="...r00025" role="tablist">
  <button _hk="...r00027005">

Tablist detached/inert. Intermittent as effect timing varies. Same class as @solidjs/web Portal/clientOnly fix — server must mint a matching owner.

Related: kobaltedev/kobalte#717 (same Solid 2 hydration strictness — this is the non-Dynamic counterpart).

Fix

Server branch now mints a matching createOwner() so the parent's child counter stays aligned:

if (isServer) { createOwner(); return; }

Mirrors @solidjs/web Portal: runWithOwner(createOwner(), ...) and the createOwner() / getNextChildId pairing in the server Portal.

Repro

SSR + hydrate a page containing Kobalte Tabs (or any component using createSelectableCollection → createEventListener). Without fix, hydration misses by +1 and tablist remains detached; with fix, hydration matches consistently.

🦋 Changeset detected

Latest commit: ab4c926

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@solid-primitives/event-listener	Patch

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📝 Walkthrough

Walkthrough

createEventListener now creates a matching owner on the server before returning. This keeps the parent hydration-id child counter aligned with the client.

Changes

Event listener hydration alignment

Layer / File(s)	Summary
Create the server-side owner packages/event-listener/src/eventListener.ts	The module imports createOwner. The server-side branch calls createOwner() before returning.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🟡 Moderate · up to 2d56d

The change adds a server-side owner to preserve hydration alignment, but the new createOwner import may not be supported by the declared Solid version and could break type-checking or builds. Merge should wait until the dependency range or implementation is aligned.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

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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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: balancing hydration IDs for createEventListener. It is concise, specific, and related to the SSR fix.

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Inline comments:
In `@packages/event-listener/src/eventListener.ts`:
- Line 9: Update the event-listener Solid integration around the createOwner
import and usage: either constrain the package dependency and peer range to a
Solid version that exports createOwner, or replace createOwner with a Solid
1.x-supported API while preserving the existing ownership behavior; ensure the
root solid-js import type-checks and builds with the declared version.

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packages/event-listener/src/eventListener.ts

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createEventListener returned early on the server (0 owners) but created one tracked-effect owner on the client (createEffect/createRenderEffect). In Solid 2 strict hydration every non-transparent owner consumes a child-id slot, so every sibling rendered after the listener shifted its hydration id by one — e.g. Hydration key miss for "...r00026" (template: <div>) with ...r00025 (role="tablist") unclaimed. Mirrors the fix @solidjs/web applies for Portal/clientOnly: server must mint a matching owner. Related: kobaltedev/kobalte#717 (same Dynamic/Polymorphic hydration class — this is the non-Dynamic counterpart via createSelectableCollection).

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coderabbitai Bot reviewed Aug 27, 2026

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Comment thread packages/event-listener/src/eventListener.ts

Jeysef changed the base branch from main to solid2 August 27, 2026 12:39

Jeysef force-pushed the fix/event-listener-hydration-id branch from 2d56d71 to 77ab3bc Compare August 27, 2026 12:41

Jeysef changed the base branch from solid2 to next August 27, 2026 13:12

Jeysef force-pushed the fix/event-listener-hydration-id branch from 77ab3bc to 8db42b0 Compare August 27, 2026 13:16

chore: add changeset for event-listener hydration fix

ab4c926

fix(event-listener): balance hydration ids for createEventListener by Jeysef · Pull Request #1048 · solidjs-community/solid-primitives · GitHub

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fix(event-listener): balance hydration ids for createEventListener - #1048

fix(event-listener): balance hydration ids for createEventListener#1048
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Jeysef:fix/event-listener-hydration-id

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fix(event-listener): balance hydration ids for createEventListener by Jeysef · Pull Request #1048 · solidjs-community/solid-primitives · GitHub

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fix(event-listener): balance hydration ids for createEventListener - #1048

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