Exploring Various Coding Languages
The node:url module provides tools for parsing, constructing, and manipulating URLs. Node.js supports two URL APIs: WHATWG URL API — modern, browser‑compatible, standards‑based. Legacy Node.js URL API — older, Node‑specific, now discouraged. The WHATWG API is the recommended approach for all modern applications. It provides a clean, consistent interface for working with URL components, query parameters, and structured URL patterns.
The node:util module provides a powerful collection of helper functions used throughout Node.js core and extremely useful for application developers. These utilities support debugging, inspection, formatting, type checking, callback/Promise conversions, argument parsing, text encoding, MIME handling, and more. It is one of the most versatile and essential toolkits in the Node.js ecosystem.
The node:worker_threads module enables true multithreading in Node.js by running JavaScript in separate threads. While Node.js is traditionally single‑threaded, worker threads allow CPU‑intensive tasks to run in parallel without blocking the event loop. They support shared memory, zero‑copy transfers, worker pools, resource limits, and advanced synchronization APIs. Worker threads are ideal for heavy computation, data processing, and parallel workloads—while async I/O remains best handled by the main thread.
The node:v8 module exposes low-level APIs that interact directly with the V8 JavaScript engine embedded in Node.js. . These APIs provide access to heap statistics, heap snapshots, coverage tools, serialization mechanisms, V8 flags, object queries, and promise lifecycle hooks. The module is essential for performance analysis, memory debugging, tooling, and advanced Node.js internals work.
The node:vm module allows you to compile and execute JavaScript code inside isolated V8 contexts — essentially creating lightweight sandboxes within your Node.js application. These contexts have their own global scope and can run code independently from the main environment. However, vm is NOT a security sandbox. It is powerful for dynamic code execution, template engines, REPLs, plugin systems, and controlled module execution, but it must never be used to run untrusted code.
