Do JS classes need a constructor?

Lots of people don’t know it, but you can use and extend real classes in Node. js already . There’s a few drawbacks, but once you learn about them, they’re really not drawbacks but postive things, that will make your code faster and better.

Class methods are created with the same syntax as object methods. Use the keyword class to create a class. Always add a constructor() method . Then add any number of methods.

Note: A class cannot have more than one constructor() method .

A constructor is a function that creates an instance of a class which is typically called an “object” . In JavaScript, a constructor gets called when you declare an object using the new keyword. The purpose of a constructor is to create an object and set values if there are any object properties present.

A constructor is a special function that creates and initializes an object instance of a class . In JavaScript, a constructor gets called when an object is created using the new keyword. The purpose of a constructor is to create a new object and set values for any existing object properties.

If you don’t define a constructor for the class, a default one is created. The default constructor is an empty function, which doesn’t modify the instance. At the same time, a JavaScript class can have up to one constructor .