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Array.prototype.sliceを使う

Last updated at Posted at 2016-02-16

備忘録
JavaScriptを学び始め、書籍「パーフェクトJavaScript」にこの様な記載があったのでメモ

.getElementsByTagName で取得したものをそのまま利用するよりも、
Arrayに変換したものをひっぱってくる方がパフォーマンス良い。
取得する要素数が多い時なんかに違いが出てくる。
※IE8以前ではエラーになる

JavaScriptを書いている人なら当たり前の事かも知れないですが。

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