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Discussion on: With great prototype power comes great responsibility

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budyk profile image
Budy

let Object.prototype.hasOwnProperty() to the rescue

if (obj.hasOwnProperty('a')) {

}
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karataev profile image
Eugene Karataev Author

Yeah, thanks for mentioning this method. But using hasOwnProperty will console.log different result in the post's example, so use it with caution.