Context used to provide an efficient way of sharing data between different components (abstractions, modules, layers) having no shared environment without coupling them.
- 1-closure.js — Context with closure
- Partially applied function with bound context; simple AccessPolicy and user auth
- 2-oop.js — Context in OOP
- Context passed to constructor; AccessPolicy, User, and AccountService as classes
- 3-factory.js — Context factory
- Factory creates services with shared context; dependency injection
- 4-pipeline.js — Context in middleware pipeline
- Async pipeline with context propagation; tracing and request IDs
- 5-async.js — Async context (AsyncLocalStorage)
- Context preserved across async boundaries without passing it explicitly
- 6-immutable.js — Immutable context
- Frozen context and derived contexts via helpers; no mutation