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Dev.to
5/10/2026
The `new` Keyword in JavaScript

The `new` Keyword in JavaScript

Short summary

JavaScript's `new` keyword automates object creation from constructor functions through four steps: creating an empty object, linking it to the constructor's prototype, executing the constructor with the correct `this` binding, and returning the populated object. Mastering these internal steps reveals how classes, React components, and broader OOP patterns work under the hood.

  • `new` automates four steps: object creation, prototype linking, constructor execution, and return
  • Constructor functions act as factory blueprints for creating multiple objects with the same structure
  • Understanding the four internal steps bridges surface usage and deep knowledge of OOP patterns

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