Where to learn JS?

Cheatsheet

[2023] Brad Traversy - Modern JavaScript From The Beginning 2.0

It's a high-level, interpreted programming language that can be used on the client side as well as the server-side with Node.js

DOM (Document Object Model) Manipulation
Event Handling (respond to mouse click, hover, form submit, keyboard)
Asynchronous Requests (interact with backend servers or public APIs, make HTTP requests to fetch, submit data)
Animations and Effects (requestAnimationFrame, fading, moving, rotate, scale)
Data Manipulation (Sort, filter, etc using array methods like map, reduce, filter)
Storing Data (Cookies, LocalStorage, etc)
Single Page Application (like React, Vue, Angular)
Creating APIs & Web Services (create APIs Node.js, Deno, Express)

Popularity: many job opportunities
Versatility (used for many different things, such as dynamic websites, APIs, mobile and desktop application)
Relatively easy to learn
Community: support, resources, tools