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Merge pull request #1340 from paroche/patch-31

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Ilya Kantor 2019-09-14 12:52:26 +03:00 • committed by GitHub
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@ -324,6 +324,6 @@ They only operate on the object itself. Properties from the prototype are *not*
- We can use `obj.__proto__` to access it (a historical getter/setter, there are other ways, to be covered soon). - We can use `obj.__proto__` to access it (a historical getter/setter, there are other ways, to be covered soon).
- The object referenced by `[[Prototype]]` is called a "prototype". - The object referenced by `[[Prototype]]` is called a "prototype".
- If we want to read a property of `obj` or call a method, and it doesn't exist, then JavaScript tries to find it in the prototype. - If we want to read a property of `obj` or call a method, and it doesn't exist, then JavaScript tries to find it in the prototype.
- Write/delete operations for act directly on the object, they don't use the prototype (assuming it's a data property, not is a setter). - Write/delete operations act directly on the object, they don't use the prototype (assuming it's a data property, not a setter).
- If we call `obj.method()`, and the `method` is taken from the prototype, `this` still references `obj`. So methods always work with the current object even if they are inherited. - If we call `obj.method()`, and the `method` is taken from the prototype, `this` still references `obj`. So methods always work with the current object even if they are inherited.
- The `for..in` loop iterates over both own and inherited properties. All other key/value-getting methods only operate on the object itself. - The `for..in` loop iterates over both its own and its inherited properties. All other key/value-getting methods only operate on the object itself.