Node.js Mastery
JavaScript on the Server
Understand how Node.js works internally: the event loop, single-threaded architecture, streams, buffers, the file system, and advanced concurrency patterns with child processes, worker threads, and clustering.
15+
Topics
90+
Exercises
60+
Quiz Questions
Free
Forever
Learning Paths
Beginner
Node.js foundations: how the single-threaded event-driven model works, the event loop phases, and essential built-in modules — path, os, process, and environment variables.
0/6 done
Intermediate
Core I/O APIs: reading and writing files with fs/promises, understanding binary data with Buffers, and processing large data efficiently with Readable/Writable/Transform streams.
0/3 done
Advanced
Concurrency patterns and practice projects: child processes, worker threads, cluster module, plus three hands-on builds — a CLI notes manager, a streaming CSV parser, and an HTTP file upload server.
0/6 done
Latest Topics
Single-Threaded Architecture
How Node.js runs JavaScript on one thread and why that is a feature, not a limitation
The Event Loop
How Node.js processes callbacks across six phases to enable non-blocking async code
The path Module
Cross-platform file path manipulation with Node's built-in path module
The os Module
Query operating system information like CPU count, memory, hostname, and temp directory
Environment Variables
Read and manage runtime configuration through process.env and .env files
The process Object
Control and inspect the running Node.js process with the global process object
What's Covered
Ready to learn Node.js?
Start from the beginning, no prior knowledge needed.
Start with Beginner