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# .cadoles-slide-title[Le futur (proche): ES6 (2/4)]
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**Écriture simplifiée des classes**
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```js
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class Animal {
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constructor(hasFur) {
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this.hasFur = hasFur;
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}
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}
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class Dog extends Animal {
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constructor() {
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super(true);
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}
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bark() {
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console.log('Woaf !');
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}
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}
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```
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