Interview preparation
React interview questions and answers for React 19.3
17 React interview questions with model answers: keys, state snapshots, effects, refs, Actions, React Compiler, Server Components and what React 19.3 added.
By Cloudsoft Zone
Guides topic
JavaScript
JavaScript tutorials for beginners and professionals: the language, the DOM, arrays, functions and modern syntax.
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Architecture guide
MCP security in 2026: tool approval, server trust and least privilege
How to secure Model Context Protocol servers and clients: vet and sandbox servers, pin tool definitions against rug pulls, design approvals, check token audience and keep scopes small.
By Cloudsoft Zone
Tutorial
How to build a dynamic WordPress block with block.json and render.php
A step-by-step tutorial for WordPress 7.1: scaffold a dynamic block with @wordpress/create-block, read the post ID from block context, add native supports, and render escaped HTML from render.php.
By Cloudsoft Zone
Interview preparation
Node.js interview questions and answers for Node.js 24 LTS
20 Node.js interview questions with model answers checked against the Node.js 24 docs: the event loop, nextTick versus setImmediate, streams, worker threads, the permission model, built-in test runner, TypeScript type stripping and graceful shutdown.
By Cloudsoft Zone
Architecture guide
Multi-tenant SaaS beyond data isolation: tenant RBAC, billing, audit logs
Design the multi-tenant layer customers notice: tenant-scoped roles, safe invitations, plan entitlements and billing states, per-tenant audit logs, and offboarding with export.
By Cloudsoft Zone
Tutorial
Add a strict nonce-based Content Security Policy to Next.js 16
A strict CSP blocks injected scripts even when an XSS bug slips through. Set one up in Next.js 16 with proxy.ts and per-request nonces, then roll it out safely.
By Cloudsoft Zone
Tutorial
Build an AI agent API with NestJS, Gemini and PostgreSQL
Build a tool-using Gemini agent in NestJS 12 with conversations stored in PostgreSQL, validated tool arguments, SSE streaming and tests that run on PGlite.
By Cloudsoft Zone
Tutorial
A provider-neutral AI layer with OpenAI, Gemini and Claude fallbacks
Build one TypeScript interface over the official OpenAI, Gemini and Claude SDKs, with capability checks, retries, fallbacks, shared schemas, tool calling and cost routing.
By Cloudsoft Zone
Upgrading to TypeScript 7.0: a tsconfig checklist for 5.x and 6.0 projects
TypeScript 6.0 changed long-standing defaults and TypeScript 7.0 replaced the compiler with a native Go port. This step-by-step checklist covers tsconfig changes, removed options and how to keep typescript-eslint working.
By Cloudsoft Zone
Tutorial
How to write a production Dockerfile for a Node.js 24 app
A step-by-step Node.js 24 Dockerfile: multi-stage build, npm ci with a cache mount, a non-root user, a curl-free health check and graceful SIGTERM handling, with the reasoning behind every line.
By Cloudsoft Zone
Interview preparation
JavaScript interview questions and answers: closures to ES2025
21 JavaScript interview questions with model answers and runnable code: scope, closures, this, the event loop, promises, debounce, modules, memory leaks and recent ECMAScript features such as iterator helpers and Set methods.
By Cloudsoft Zone
Tutorial
NestJS microservices: reliable reconnection, retries and failure handling
How each NestJS transport behaves when a connection drops, and the timeouts, safe retries, idempotent handlers, dead letters and health checks that keep services reliable.
By Cloudsoft Zone
Showing 12 articles