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Add some missing javascript in examples #75

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Add some missing javascript in examples #75

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7 changes: 6 additions & 1 deletion text/background/javascript.md
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Original file line number Diff line number Diff line change
Expand Up @@ -90,7 +90,7 @@ class Dog extends Animal {
`Dog` is a subclass of `Animal`. `this.constructor.name` is the name of the class (`'Dog'` if `new Dog()` or `'Animal'` if `new Animal()`). In its constructor, it calls the superclass’s constructor (`super(name)`) and then logs. So now if we do:

```js
const graphy = new Dog()
const graphy = new Dog('Graphy')
console.log(graphy.name)
graphy.speak()
```
Expand All @@ -110,11 +110,16 @@ A subclass can override a superclass’s method or define new methods:
class Dog extends Animal {
constructor(name) {
super(name)
console.log('Subspecies: Canis lupus familiaris.')
}

speak() {
console.log(`${this.name} barks.`)
}

sit() {
console.log(`${this.name} sits.`)
}
}

const loren = new Animal('Loren')
Expand Down