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Ilya Kantor 2019-08-04 11:29:15 +03:00
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1-js/09-classes/02-class-inheritance/article.md
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@ -92,7 +92,7 @@ Internally, `extends` keyword adds `[[Prototype]]` reference from `Rabbit.protot
So, if a method is not found in `Rabbit.prototype`, JavaScript takes it from `Animal.prototype`.
As we can recall from the chapter <info:native-prototypes>, JavaScript uses the same prototypal inheritance for build-in objects. E.g. `Date.prototype.[[Prototype]]` is `Object.prototype`, so dates have generic object methods.
As we can recall from the chapter <info:native-prototypes>, JavaScript uses prototypal inheritance for build-in objects. E.g. `Date.prototype.[[Prototype]]` is `Object.prototype`, so dates have generic object methods.
````smart header="Any expression is allowed after `extends`"
Class syntax allows to specify not just a class, but any expression after `extends`.
@ -131,7 +131,6 @@ class Rabbit extends Animal {
}
```
...But usually we don't want to totally replace a parent method, but rather to build on top of it, tweak or extend its functionality. We do something in our method, but call the parent method before/after it or in the process.
Classes provide `"super"` keyword for that.