fix: clearTimeout

[chiaweilee]

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[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• [ x ] Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Branch merge
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👻 What's the background?

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method. in BookInfo (created by Route)

1. Describe the source of requirement, like related issue link.

2. Describe the problem and the scenario.

💡 Solution

use clearTimeout

📝 Changelog description

Describe changes from userside, and list all potential break changes or other risks.

1. English description

clear Timeout on willUnmount

2. Chinese description (optional)

☑️ Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• [ x ] Changelog is provided or not needed

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[afc163]

[codecov]

Codecov Report

Merging #15434 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #15434      +/-   ##
==========================================
+ Coverage   94.19%   94.23%   +0.04%     
==========================================
  Files         250      250              
  Lines        6647     6647              
  Branches     1910     1942      +32     
==========================================
+ Hits         6261     6264       +3     
+ Misses        385      382       -3     
  Partials        1        1

Impacted Files	Coverage Δ
components/_util/wave.tsx	87.5% <0%> (+2.88%)	⬆️

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