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remove extra break lines and add missed #2992

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Merged
merged 7 commits into from
May 12, 2022
Merged

remove extra break lines and add missed #2992

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3be0d3e
remove one extra break line
Rnbsov May 7, 2022
2f56ecf
add a missed break line
Rnbsov May 7, 2022
d84ebc2
remove extra break lines
Rnbsov May 7, 2022
060d8fe
remove another one extra break line
Rnbsov May 7, 2022
35d465c
add comma
Rnbsov May 7, 2022
5fa8679
add dot
Rnbsov May 7, 2022
b70d332
👾 smth
Rnbsov May 12, 2022
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7 changes: 2 additions & 5 deletions 1-js/09-classes/02-class-inheritance/article.md
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Expand Up @@ -160,6 +160,7 @@ Now `Rabbit` has the `stop` method that calls the parent `super.stop()` in the p
As was mentioned in the chapter <info:arrow-functions>, arrow functions do not have `super`.

If accessed, it's taken from the outer function. For instance:

```js
class Rabbit extends Animal {
stop() {
Expand All @@ -176,7 +177,6 @@ setTimeout(function() { super.stop() }, 1000);
```
````


## Overriding constructor

With constructors it gets a little bit tricky.
Expand Down Expand Up @@ -280,8 +280,6 @@ alert(rabbit.earLength); // 10
*/!*
```



### Overriding class fields: a tricky note

```warn header="Advanced note"
Expand Down Expand Up @@ -370,13 +368,12 @@ In our case, `Rabbit` is the derived class. There's no `constructor()` in it. As

So, `new Rabbit()` calls `super()`, thus executing the parent constructor, and (per the rule for derived classes) only after that its class fields are initialized. At the time of the parent constructor execution, there are no `Rabbit` class fields yet, that's why `Animal` fields are used.

This subtle difference between fields and methods is specific to JavaScript
This subtle difference between fields and methods is specific to JavaScript.

Luckily, this behavior only reveals itself if an overridden field is used in the parent constructor. Then it may be difficult to understand what's going on, so we're explaining it here.

If it becomes a problem, one can fix it by using methods or getters/setters instead of fields.


## Super: internals, [[HomeObject]]

```warn header="Advanced information"
Expand Down