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並前往https://doctorderek.medium.com/number-isfinite-is-the-best-way-to-check-for-a-number-in-javascript-31a1b8c75ca3

Number.isFinite() is the best way to check for a number in ...

Need a simple way to check for a number in JavaScript, but don't want NaN or Infinity ? Use Number.isFinite() instead of typeof .

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