var hoge1;
var hoge2 = 1;
console.log("hoge1 =", typeof hoge1, typeof hoge1 === 'undefined'); // hoge1 = undefined true
console.log("hoge2 =", typeof hoge2, typeof hoge2 === 'undefined'); // hoge2 = number false
console.log("hoge3 =", typeof hoge3, typeof hoge3 === 'undefined'); // hoge3 = undefined true
Last active
March 11, 2021 16:37
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