feat: share runtime-components exports between the main and lazy bundles

[upupming]

The Page component has a singleton pageMounted variable. It should be shared between the main and lazy bundles to make it work properly in lazy bundle.

Summary by CodeRabbit

• Bug Fixes
  • Fixed runtime-components exports to be accessible from both main and lazy bundles, ensuring consistent API availability across bundle types.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).
• Changeset added, and when a BREAKING CHANGE occurs, it needs to be clearly marked (or not required).

[changeset-bot]

🦋 Changeset detected

Latest commit: 5023aa5

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

This PR includes changesets to release 1 package

Name	Type
@lynx-js/react	Patch

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

Click here if you're a maintainer who wants to add another changeset to this PR

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds lazy bundle support for @lynx-js/react/runtime-components exports. It introduces a new lazy entry point that re-exports Page and DeferredListItem through a dynamic symbol-based mapping, updates the package.json exports map, and includes corresponding test coverage.

Changes

Cohort / File(s)	Summary
Configuration & Release .changeset/cute-frogs-refuse.md, packages/react/package.json	Adds changeset entry for patch release documenting runtime-components export sharing; updates package.json to include lazy export for ./runtime-components pointing to lazy bundle entry point.
Lazy Loading Infrastructure packages/react/runtime/lazy/target.js, packages/react/runtime/lazy/import.js	Introduces new Symbol constant sExportsReactRuntimeComponents for identifying runtime-components exports; imports ReactRuntimeComponents and exposes it via Object.defineProperty in the lazy import module.
Lazy Runtime Components Entry Point packages/react/runtime/lazy/runtime-components.js	New file that re-exports Page and DeferredListItem from the dynamic symbol-based target mapping for lazy bundle consumption.
Test Coverage packages/react/runtime/__test__/lazy.test.js	Updates test to validate runtime-components exports from lazy bundle, replacing previous jsx-runtime test; imports and validates Page and DeferredListItem against expected public API surface.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

The changes follow a consistent, homogeneous pattern across files—adding a new lazy export path through the existing symbol-based mapping system. While understanding the lazy loading architecture is helpful, individual changes are straightforward and repetitive in nature.

Suggested labels

framework:React

Suggested reviewers

• hzy
• colinaaa
• Yradex

Poem

🐰 Through lazy symbols we hop and weave,
Runtime components now interleave,
Bundles share their treasured Page and List,
No duplication shall be missed! 🌟

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title Check	✅ Passed	The PR title "feat: share runtime-components exports between the main and lazy bundles" directly and accurately reflects the primary objective of the changeset. The changes across all files—adding a lazy export in package.json, updating the test, importing runtime-components in import.js, creating runtime-components.js, and adding the corresponding Symbol in target.js—all work together to accomplish exactly what the title describes. The title is specific, clear, and concise, using concrete terminology that would help teammates understand the purpose when scanning commit history.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[relativeci]

React Example

#5954 Bundle Size — 237.5KiB (0%).

5023aa5(current) vs 353312e main#5953(baseline)

Bundle metrics  no changes

	Current #5954	Baseline #5953
Initial JS	0B	0B
Initial CSS	0B	0B
Cache Invalidation	0%	0%
Chunks	0	0
Assets	4	4
Modules	165	165
Duplicate Modules	67	67
Duplicate Code	46.77%	46.77%
Packages	2	2
Duplicate Packages	0	0

Bundle size by type  no changes

	Current #5954	Baseline #5953
IMG	145.76KiB	145.76KiB
Other	91.74KiB	91.74KiB

Bundle analysis report Branch upupming:feat/disable-page-in-la... Project dashboard

---

^{Generated by RelativeCI Documentation Report issue}

[relativeci]

Web Explorer

#5950 Bundle Size — 364.68KiB (0%).

5023aa5(current) vs 353312e main#5949(baseline)

Bundle metrics   1 change

	Current #5950	Baseline #5949
Initial JS	144.63KiB	144.63KiB
Initial CSS	32.11KiB	32.11KiB
Cache Invalidation	0%	0%
Chunks	8	8
Assets	8	8
Modules	220(+0.46%)	219
Duplicate Modules	16	16
Duplicate Code	3.23%	3.23%
Packages	4	4
Duplicate Packages	0	0

Bundle size by type  no changes

	Current #5950	Baseline #5949
JS	238.77KiB	238.77KiB
Other	93.8KiB	93.8KiB
CSS	32.11KiB	32.11KiB

Bundle analysis report Branch upupming:feat/disable-page-in-la... Project dashboard

---

^{Generated by RelativeCI Documentation Report issue}

[codspeed-hq]

CodSpeed Performance Report

Merging #1895 will improve performances by 6.32%

_{Comparing upupming:feat/disable-page-in-lazy (5023aa5) with main (353312e)}

Summary

⚡ 1 improvement
✅ 52 untouched
⏩ 3 skipped¹

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	transform 1000 view elements	44.9 ms	42.2 ms	+6.32%

Footnotes

1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩