Why is Node.js single-threaded?

Node.js uses a single-threaded event loop to handle concurrency. This design:

• Simplifies programming by avoiding thread-related bugs like race conditions.
• Uses non-blocking I/O so a single thread can handle many connections efficiently.
• Offloads heavy tasks (file I/O, network requests) to background threads in the libuv

thread pool.

So, Node.js can handle many tasks concurrently without spawning multiple OS threads for

each.