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JavaScriptでfalsyな値の一覧

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#falsyな値とは
falsyな値とは、Booleanで真偽値に変換した場合にfalseになる値のこと。
※truthyな値は、trueになる値のこと。

#falsyな値の一覧

  • false
  • 0
  • 0n
  • ""
  • null
  • undefined
  • Nan

#まとめ
変数の値がfalsyかどうかプログラムの中で確認することは多々あると思います。
そのときにfalsyな値かどうかを毎回、デバックで確認するのは手間なので覚えておくと便利です。

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