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@te2u

JavaScriptのオブジェクトが空であるかを調べる

31
Posted at

Object.keys()でキーを取り出し、その数が0であるか調べる。
オブジェクトをハッシュとして扱うときに使う。

var obj = {};

if (0 === Object.keys(obj).length) {
    ...
}

参考

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