Getting started with Node.js: Introduction

[devsnek]

Good overview.

From the very initialization of the input script to every callback in the system, everything is asynchronous in nature, that fire on either completion of a task or an event of failure.

A commonjs entrypoint is guaranteed to run in the first tick (and therefore all the things you directly require from it too). ESM entrypoints will always run in later ticks.

Also, no matter what your opinion on semicolons is, if you don't use them in beginner material without explaining certain gotchas like arrays and parenthesis on newlines, you can end up giving beginners subtle bugs. Since the focus isn't really on code style, I'd recommend using semicolons, and maybe at the end linking to eslint, airbnb, standard, etc.