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ulタグ配下のliの数を取得

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はじめに

  • 簡単なJS実装のデバッグで確認のため

問題

  • 要素の数がどのくらいになるかわからなかった

解決

document.getElementsByTagName('ul')[0].children.length

終わりに

  • indexの部分を変えるとHTMLCollectionから他のulを選べる
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