Constructor functions in JavaScript

Introduction Link to heading

Builder functions in JavaScript allow you to create objects in a more efficient and reusable way. They are a fundamental tool for object-oriented programming (OOP) in JavaScript.

Example Link to heading 

// Constructor function to create "Car" objects
class Car {
  // Car properties
  constructor(make, model, year) {
    this.make = make;
    this.model = model;
    this.year = year;
  }
}

// Creating a new "Car" object
var newCar = new Car("Tesla", "Model 3", 2020);

// Printing the car's properties
console.log(newCar); // Prints "Car { make: "Tesla", model: "Model 3", year: 2020 }"

Explanation: Link to heading

  • The constructor function Car defines the properties make, model and year for the objects that are created from it.
  • The new keyword is used to create a new instance of the Car constructor function.
  • The newCar variable stores the reference to the new created object.
  • When printing the newCar variable, the object properties are displayed with their corresponding values.

Advantages of using constructor functions: Link to heading

  • They allow you to create objects with a predefined structure and properties.
  • They facilitate the creation of objects repetitively.
  • They promote code reuse.
  • They allow you to create objects with greater complexity and behavior.

Disadvantages of using constructor functions: Link to heading

  • They can be more complex to understand than traditional functions.
  • They require a basic knowledge of object-oriented programming.

Keep learning about constructor functions to write more efficient and modular JavaScript code!

Additionally: Link to heading

  • You can add methods to the Car constructor function to define specific behaviors.
  • You can use inheritance to create new classes from a base class, such as Car.

Example of a method: Link to heading 

class Car {
  constructor(make, model, year) {
    this.make = make;
    this.model = model;
    this.year = year;
  }

  startEngine() {
    console.log("The car is now started");
  }
}

var newCar = new Car("Tesla", "Model 3", 2020);

newCar.startEngine(); // Prints "The car is now started"
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