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Languages & runtimes · #nodejs
Socket.io Rooms let you broadcast events only to relevant clients — cutting network overhead and CPU. This post covers join/leave patterns, a worked chat-channel example, scaling with the Redis adapter, and the trade-offs you'll hit at scale.
Zero‑dependency testing in Node.js is possible with the built‑in node:test runner. This blog explains its features, shows a concrete Express integration test, compares it to Jest, and gives a quick checklist for adopting node:test in new projects.
Passport.js sessions can balloon if you store the whole user profile. This blog explains why keeping the session tiny—by serializing only an ID—matters, how to order middleware correctly, and the trade‑off of a per‑request database lookup.
Learn how to use FeathersJS hooks to decouple business logic from data access, keeping your services clean and your application scalable.
Enable Mocha parallel mode to run test files concurrently with worker threads, with prerequisites, configuration steps, and isolation checks.
Replace dependencies in Jest tests using manual mocks stored in __mocks__ folders, with a worked example and limits.
When a series of DB operations must either all succeed or fail together, Knex.js transactions with nested savepoints let you roll back only the failed part without discarding earlier work. This guide walks through the pattern, shows a concrete example, and highlights trade‑offs.
An architecture note on designing Pug template inheritance with extends and block directives, constraining include paths, and maintaining cache and escaping discipline.
Enable Fastify to automatically validate incoming JSON against a TypeBox schema, returning clear 400 errors on failure. Follow this step‑by‑step guide to register the plugin, define schemas, attach them to routes, and verify the outcome with tests.
feathersjs
mocha
jest
knexjs
fastify