All 10 Classes & Class Syntax questions
More in Classes & Class Syntax
How does the constructor method work in a class? How do you create a subclass using extends? What are class fields, and how do they differ from constructor-assigned properties? What does the # syntax mean for class members? How do getters and setters work inside a class? How does method overriding with super work in JavaScript classes? What is a static initialization block and why would you use one? Why can classes not be called without 'new', unlike regular functions?
Advertisement
JavaScript › Classes & Class Syntax

What are static methods and properties, and when do you use them?

Intermediate

Answer

static members belong to the class itself, not to instances — you call them as ClassName.method() rather than instance.method(). They're useful for factory methods, utility functions, or shared counters tied to the class as a whole.
class User {
  static count = 0;
  constructor() { User.count++; }
  static fromJSON(json) { return new User(JSON.parse(json)); }
}
Real-world example A static User.fromJSON() factory method that builds a User instance from an API response.

Common follow-ups: Can static methods access instance properties directly?

JSON & Data Serialization
All 10 Classes & Class Syntax questions