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javaScript68_toString()

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ブラウザ何を出力するときは、実はtoString()関数の戻り値を出力しています。
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上記の例だと、toStringはperの中にだけ追加されている。
全て生成されたインスタンスの中に同じtoStringをアクセスしたければ、toStringをクラスのインスタンスに追加すればOKです。
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