docs: Fixed the playground example undeclared variable

[yjhtry]

I really enjoy the Elysia Playground! Learning a web service framework directly in the browser feels like magic! 😄

I noticed a variable name issue in the example under the life-cycle section and fixed it.

Summary by CodeRabbit

• Documentation

  • Updated life-cycle documentation.

• Bug Fixes

  • Enhanced response type-checking logic for more accurate data detection.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

A type-check in mapResponse was corrected to verify the responseValue parameter instead of an unrelated response variable. This aligns the JSON-detection logic with the actual callback parameter being processed.

Changes

Cohort / File(s)	Summary
Bug fix in documentation example docs/essential/life-cycle.md	Fixed mapResponse type-check to reference responseValue parameter instead of response variable for correct JSON detection

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~5 minutes

• Verify the variable reference is now correct in the context of the example
• Confirm the JSON-detection logic now properly checks the intended parameter

Poem

🐰 A rabbit hops through docs with glee,
Found a variable not quite right to see—
responseValue now catches the light,
JSON detection sparkles, shining bright! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly addresses the main change: fixing an undeclared variable (responseValue) in the playground example documentation, matching the code modification that replaced the type-check target from 'response' to 'responseValue'.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

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

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5e5da8b and 7d4b0ea.

📒 Files selected for processing (1)

• docs/essential/life-cycle.md (1 hunks)

🔇 Additional comments (1)

docs/essential/life-cycle.md (1)

708-715: Excellent catch on the undeclared variable bug.

The mapResponse callback receives responseValue as a parameter, but the original code was checking response, which doesn't exist in that scope. This would cause a ReferenceError at runtime when someone copies the example. The fix correctly uses responseValue in the type check, aligning with both the destructured parameter name and other similar examples in the documentation (lines 116, 144, 870).

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