* fix: use loading delay not delay at first time
* perf: test code
* refactor: optimization code
* fix: lint problem
* refactor: prefer code
* refactor: prefer code
* refactor: prefer code
* fix: Clear delay loading timer after Button is unmounted
* [CodeFactor] Apply fixes to commit 16cfb89
[ci skip] [skip ci]
* Change arrow function style in test case
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