An example of a class implementation using Javascript, showcasing the this keyword.

class-example.js

//Create Class
class Dog {
  //Assign properties to the newly created object in the constructor using "this"
  constructor(name, breed, age) {
    this.name = name;
    this.breed = breed;
    this.age = age;
  }

  bark() {
    console.log("Bark bark!");
  }
  /* Update properties using set methods; set updates the "this" properties
  * of the object.
  */
  setName(name) {
    this.name = name;
  }

  setBreed(breed) {
    this.breed = breed;
  }

  setAge(age) {
    this.age = age;
  }

  getName() {
    return this.name;
  }

  getBreed() {
    return this.breed;
  }

  getAge() {
    return this.age;
  }
}
//Create new Dog object
const myDog = new Dog("Isabelle", "Golden Retriever", 2);
console.log(myDog); //Dog { name: 'Isabelle', breed: 'Golden Retriever', age: 2 }
//Update name property using setName method
myDog.setName("Molly");
console.log(myDog); //Dog { name: 'Molly', breed: 'Golden Retriever', age: 2 }