Constructor Functions in JS

constructor-functions-js.md

Constructor Functions in JS

If you have several objects that share the same implementation, you can use a constructor function to create them.

Any function can be a constructor function as long as it is invoked using the new keyword

function createSillyExample() {}

const objectCreatedFromSillyExample = new createSillyExample();
// result: {}

"Classes" in JS

class Human {
  constructor(name) {
    this.name = name;
  }
  
  getName() {
    return this.name;
  }
}

Here's what's happening here:

• A new variable Human is created and it's assigned to the constructor function in the "class" from above;
• getName is a property, which is a method on the prototype of the constructor function;

You are not forced to set constructor method in the class. If not provided, JS engine will provide the following:

• constructor() {}

Getters and Setters(check getters/setters section)

Static properties and methods(check static properties and methods section)