Node Version Manager (NVM) is an open source version manager for Node.js (Node) and allows to easily install & manage different versions of Node and switch between them on a per-shell basis.
AbortController is the standard way to abort any ongoing operations. AbortController and AbortSignal are now part of Nodejs LTS (originally introduced in v15.0.0).
Modern apps usually don’t work in isolation. They interact with entities like other APIs, file system, network, databases, etc. Each of these interactions adds an unknown delay to the handling of the incoming request. Sometimes, these interactions can take long time than expected resulting in overall delay in response. In such cases, the apps need a way to abort any operations that have taken longer than expected.
Mongoose is the most widely schema-based solution to model your application data in MongoDB. It includes built-in type casting, validation, query building, business logic hooks and more, out of the box.
Event Loop is what allows Node.js to perform non-blocking I/O operations — despite the fact that JavaScript is single-threaded — by offloading operations to the system kernel whenever possible.
Since most modern kernels are multi-threaded, they can handle multiple operations executing in the background. When one of these operations completes, the kernel tells Node.js so that the appropriate callback will eventually be executed.
Timers and process.nextTick() are core concepts of Nodejs. It is important to undestand and be familiar with these and use them with ease. setTimeout(callback, 0), setImmediate(callback) and process.nextTick(callback) appear to be doing the same thing. I have tried to make this concept easier to understand.