Node.js & JavaScript Backend¶

Runtime & Internals¶

• [[event-loop-and-architecture]] - V8, libuv, event loop, clustering, where Node.js fits and doesn't
• [[v8-optimization]] - Hidden classes, monomorphic/polymorphic code, JIT, small function inlining
• [[closures-and-scope]] - Lexical scope, closures as heap data structures, module scope

Async Programming¶

• [[async-patterns]] - Callbacks, Promises, async/await, thenable objects, AbortController
• [[streams]] - Readable/Writable/Transform/Duplex, backpressure, buffer optimization
• [[concurrency-patterns]] - Actor model, CRDT, SharedWorker, binary protocols, deployment

Language & Type System¶

• [[modules-and-packages]] - CommonJS vs ESM, interop, package-lock, npm, module cache
• [[solid-and-grasp]] - SOLID/GRASP in JavaScript, algebraic types, immutable records, LSP
• [[design-patterns-gof]] - Factory, Strategy, Observer, Adapter, Facade, Proxy, Flyweight, State

Architecture¶

• [[application-architecture]] - DDD structure, layers, transport abstraction, context isolation
• [[data-access-patterns]] - Repository, Active Record, cursors, transactions, DAL
• [[dependency-injection]] - DI vs module system, coupling reduction, platform abstraction
• [[middleware-and-http]] - HTTP/WS transport, middleware as Chain of Responsibility, multi-framework

Operations¶

• [[error-handling]] - AppError, AggregateError, Error.cause, fail-fast, error types
• [[security-and-sandboxing]] - Crypto, password hashing, vm sandbox, macaroons vs JWT
• [[performance-optimization]] - Round-trip reduction, Map vs Object, buffer optimization, DSL vs imperative