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Ilya Kantor 2022-06-28 21:54:02 +04:00
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1-js/08-prototypes/04-prototype-methods/article.md
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@ -216,6 +216,8 @@ alert(Object.keys(chineseDictionary)); // hello,bye
- Getting/setting the prototype using the built-in `__proto__` getter/setter isn't recommended, it's now in the Annex B of the specification.
- We covered prototype-less objects, created with `Object.create(null)` or `{__proto__: null}.
- We also covered prototype-less objects, created with `Object.create(null)` or `{__proto__: null}`.
These objects are used as dictionaries, to store any (possibly user-generated) keys. Without explicitly `null` prototype, objects inherit built-in methods and `__proto__` getter/setter from `Object.prototype`, making corresponding keys "occupied" and potentially causing side effects. With `null` prototype objects are truly empty.
These objects are used as dictionaries, to store any (possibly user-generated) keys.
Without explicitly `null` prototype, objects inherit built-in methods and `__proto__` getter/setter from `Object.prototype`, making corresponding keys "occupied" and potentially causing side effects. With `null` prototype objects are truly empty.