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[クイズ]javascriptと仲良くなるための一歩 第29話「nullでcreate2」

問題

var obj = {}
obj //=> {}
typeof obj //=> "object"
obj instanceof Object //=> ?
var obj = Object.create(null)
obj //=> {}
typeof obj //=> "object"
obj instanceof Object //=> ?

:mouse:
:cow:
:tiger:
:rabbit:
:dragon_face:
:snake:
:horse:
:sheep:
:monkey_face:
:bird:
:dog:
:boar:
:mouse:
:cow:
:tiger:
:rabbit:
:dragon_face:
:snake:
:horse:
:sheep:
:monkey_face:
:bird:
:dog:
:boar:

答え

なんで?:hugging:

var obj = {}
obj //=> {}
typeof obj //=> "object"
obj instanceof Object //=> true
var obj = Object.create(null)
obj //=> {}
typeof obj //=> "object"
obj instanceof Object //=> false

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