[tannerlinsley]

Addresses part A of #187, reported by @toomingos. The issue stays open for its separate default-content and DOM-write work.

Move custom tooltip target state into a tooltip-owned component and retain its chart child between target updates. Parent prop changes still update the host. This avoids repeated adapter updates without an external store, new dependency, type assertion, or public API change.

Verification:

• The new ordinary and Strict Mode regressions pass. Both fail against current main with three adapter updates during three target changes.
• Existing React lifecycle tests pass, including custom body composition and pinned dismissal.
• pnpm validate passes all 19 targets (run), including 2,251 DOM tests across 290 files. Generated previews preserve all 188 SVGs.
• Chromium, Firefox and WebKit pass all three wrappers with client mounting and hydration, 18 cases covering target values, pinning, dismissal, parent changes, disable/enable, surface identity and teardown.
• Retained installed tarballs pass the same 18 lifecycle cases on each of React 18.0.0, 18.3.1 and 19.2.3, 54 cases total. The bundle resolves 116 packed Charts inputs with no workspace sources. Host render counts are measured only in source instrumentation, not the packed check.
• All 146 existing production consumer bundles are byte-identical and their limits pass. Those cases exclude the custom React bridge. A separate all-exports tooltip entry adds 0.052 minified / 0.007 gzip decimal kB and decreases Brotli by 0.023 kB. No budgets or benchmark records change.

The scene already avoided redraws before this fix. The removed work is the React host render and adapter update, not an asserted scene-render speedup.

Summary by CodeRabbit

• Bug Fixes
  • Custom tooltip target changes, including keyboard navigation, now update tooltip content without rerendering the chart.
  • Parent prop changes continue to update the chart and tooltip. Tooltip content is removed when disabled and returns when re-enabled.

[changeset-bot]

🦋 Changeset detected

Latest commit: c0e7077

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

This PR includes changesets to release 12 packages

Name	Type
@tanstack/react-charts	Patch
@tanstack/alpine-charts	Patch
@tanstack/angular-charts	Patch
@tanstack/charts	Patch
@tanstack/charts-scales	Patch
@tanstack/lit-charts	Patch
@tanstack/octane-charts	Patch
@tanstack/preact-charts	Patch
@tanstack/react-native-charts	Patch
@tanstack/solid-charts	Patch
@tanstack/svelte-charts	Patch
@tanstack/vue-charts	Patch

Not sure what this means? Click here to learn what changesets are.

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View your CI Pipeline Execution ↗ for commit c0e7077

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nx run charts-workspace:benchmark-check	✅ Succeeded	<1s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-10-16 08:33:59 UTC

[coderabbitai]

📝 Walkthrough

The React chart wrappers now use a shared TooltipBody component. Tooltip target changes update the tooltip body without updating the chart host, while parent prop changes still update the chart.

Changes: React tooltip state isolation

Layer / File(s)	Summary
Shared tooltip state handling packages/react-charts/src/tooltip.tsx	Chart, RendererChart, and CanvasChart use TooltipBody to provide tooltip target updates and render custom tooltip content. The chart child is memoized, and tooltip content renders only when a renderer and target are present.
Tooltip tests and supporting records packages/react-charts/src/tooltip.test.tsx, .changeset/react-tooltip-state.md, API-FRICTION.md, benchmarks/conformance/previews/manifest.json	Tests cover keyboard target changes, parent prop updates, tooltip body removal and restoration, and cleanup in both Strict Mode configurations. The changeset, follow-up note, and manifest hash are updated.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~15 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to c0e70

The tooltip change itself looks sound. The new test imports act from react, which may not work on some older React 18 versions, but this affects only the test setup and not shipped behavior.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		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 5 functions across 2 files. (3 skipped: 3 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: isolating custom tooltip target updates in React.

Full details: Docstring Coverage

Explanation

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 5 functions across 2 files. (3 skipped: 3 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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✨ Finishing Touches: 💡 1

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Actionable comments posted: 1

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @packages/react-charts/src/tooltip.test.tsx:
- Line 2: Update the act import in the tooltip test to use a test helper
compatible with the declared React 18 peer range, so the test runs on React
18.0.0 and later. Do not narrow the supported test workflow unless that is the
established project approach.

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ℹ️ Review info

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• Configuration used: defaults
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• Run ID: 0a228be8-889c-462a-b3ea-a50c9ce7b119

📥 Commits

Reviewing files that changed from the base of the PR and between 9d80699 and c0e7077.

📒 Files selected for processing: 5

• .changeset/react-tooltip-state.md
• API-FRICTION.md
• benchmarks/conformance/previews/manifest.json
• packages/react-charts/src/tooltip.test.tsx
• packages/react-charts/src/tooltip.tsx

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