feat: ENG-9092 Correctly convert For loop in Mitosis JSX to repeat.collection in Builder JSON

[midhunadarvin]

Description

Please provide the following information:

• What changes you made:

  • Correctly convert For loop in Mitosis JSX to repeat.collection in Builder JSON

• Why you made them, and:

  • Mitosis JSX

    <For each={[1,2,3]}>
      <div>Hello</div>
    </For>
    

    Currently the For loop in Mitosis JSX is converted to the following in Builder JSON

    Builder JSON within a builder block

    "repeat": {
        "collection": "[1, 2, 3]"
     },
    

    Which is not valid builder JSON, and it should be assigned a value in the data.state object in Builder JSON. This PR corrects the conversion so that the repeat.collection property is populated correctly.

• Any other useful context:

Make sure to follow the PR preparation steps in CONTRIBUTING.md before submitting your PR:

• format the codebase: from the root, run yarn fmt:prettier.
• update all snapshots (in core & CLI): from the root, run yarn test:update
• add Changeset entry: from the root, run yarn g:changeset and follow the CLI instructions. Alternatively, use the Changeset Github Bot to create the file.

[changeset-bot]

🦋 Changeset detected

Latest commit: 9a0ffe8

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

This PR includes changesets to release 2 packages

Name	Type
@builder.io/mitosis	Patch
@builder.io/mitosis-cli	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

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 9a0ffe8.

Command	Status	Duration	Result
nx run-many --target test	✅ Succeeded	5m 14s	View ↗
nx e2e @builder.io/e2e-app	✅ Succeeded	1m 17s	View ↗
nx run-many --target build --exclude @builder.i...	✅ Succeeded	3m 47s	View ↗
nx build @builder.io/mitosis-site	✅ Succeeded	2m 25s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-06-24 16:00:48 UTC

[liamdebeasi]

Good to merge once final comment is resolved. good job!