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Start your free trialHanwen Zhang
20,084 PointsWhat does the speak() method works here? and how to use it as I don't see it in the constructor method
class Pet { constructor(animal, age, breed, sound) { this.animal = animal; this.age = age; this.breed = breed; this.sound = sound; }
speak() { console.log(this.sound); }
2 Answers
Peter Vann
36,427 PointsHi Hanwen!
The method does NOT need to be part of the constructor because it does not require any initialized value.
It does, use the "sound" property value, however, which IS initialized in the constructor.
Consider this code:
class Pet {
constructor(animal, age, breed, sound) {
this.animal = animal;
this.age = age;
this.breed = breed;
this.sound = sound;
}
speak() {
console.log(this.sound);
}
}
const myPet = new Pet('dog', 4, 'pit bull', 'snarl');
myPet.speak();
It will log "snarl", to the console.
I hope that helps.
Stay safe and happy coding!
Kylie Soderblom
3,890 Pointsthe constructor includes only properties! Methods are included inside the new class object but outside of the constructor function.
class NewClass { // new class blueprint for all future instances
constructor (animal, age) { // only properties
this.animal = animal;
this.age = age;
}
speak() // new methods inside new class
anotherMethod()
}
// note the word 'function' is not used when adding methods inside a class
Hanwen Zhang
20,084 PointsHanwen Zhang
20,084 PointsUnderstood now, Thank you Peter