Private Field

Definitions

1. A class member variable that is only accessible within the class that declares it, enforcing encapsulation by preventing external code from reading or modifying internal state. In JavaScript, private fields are denoted with a # prefix; in languages like Java and C#, the private keyword is used.

   In plain English: A piece of data inside a class that only the class itself can see or change — hidden from the outside world.

   Example: "I made the token a private field so nothing outside the auth class can accidentally leak it."

Related Terms

• Callback Hell
• Polymorphism
• Singleton
• Transpiler
• Deno
• Bun
• Property Accessor
• Setter
• Tell Don't Ask