fix(fixture): correct variable name in componentWillUnmount

[everettbu]

Mirror of facebook/react#36030
Original author: MorikawaSouma

---

Summary

In \ixtures/attribute-behavior/src/App.js, the \componentWillUnmount\ method had a bug where it checked for \ his.timeout\ but cleared \ his.interval\ (which doesn't exist).

This caused a memory leak where timeouts were never properly cleaned up on component unmount.

Fix

Changed:
\\js
clearTimeout(this.interval);
\\

To:
\\js
clearTimeout(this.timeout);
\\

Test Plan

• No functional changes, only a bug fix in fixture code
• Verify the correct variable is now being cleared

Fixes #35814

[greptile-apps]

Greptile Summary

This PR fixes a one-line bug in the componentWillUnmount method of the Result class in fixtures/attribute-behavior/src/App.js, where clearTimeout(this.interval) was incorrectly called instead of clearTimeout(this.timeout).

• The Result component uses only this.timeout (set via setTimeout in onMouseEnter) — there is no this.interval property anywhere in the class.
• The pre-fix code was effectively a no-op on unmount (clearTimeout(undefined) does nothing), meaning any pending timeout would survive component unmount, causing a memory leak.
• Both onMouseEnter and onMouseLeave already correctly referenced this.timeout; this change makes componentWillUnmount consistent with those handlers.
• The fix is confined to fixture/demo code, so there is no impact on the React library itself.

Confidence Score: 5/5

• This PR is safe to merge — it is a single-line, clearly correct bug fix in fixture code with no risk of regression.
• The change is minimal and self-evidently correct: the rest of the class consistently uses this.timeout, and this.interval does not exist. The fix aligns componentWillUnmount with the established pattern and resolves a real memory-leak path in a fixture file.
• No files require special attention.

Important Files Changed

Filename	Overview
fixtures/attribute-behavior/src/App.js	Corrects componentWillUnmount to call clearTimeout(this.timeout) instead of clearTimeout(this.interval), fixing a memory leak where the pending timeout was never cleared on unmount.

_{Last reviewed commit: f2e7294}