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Last active December 25, 2018 16:44
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hasOwnProperty JS
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hasownproperty.md

hasOwnProperty

const person = {
  name: null
}

// create new object and set its __proto__ to point to person object
const ivan = Object.create(person);

ivan.hasOwnProperty("name") // false

ivan.name = "ivan"
ivan.hasOwnProperty("name") // true

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