JS FAQ - JavaScript Guides Online

How to install ESLint in a JavaScript project

ESLint setup with npm scripts in package.json. Configuration for lint and lint:fix commands to analyze, target, and auto-fix JS/JSX files using the --fix flag.

Variables and Types

How to declare a variable in JavaScript using var, let, and const

Variables and Typesconst, js types, let, var, variables

JavaScript let, const, & var best practices. Simple rule: use const by default, let for reassignment, never var. Modern variable declaration for robust code.

JS Basics

How to write your first JavaScript program

JS Basicsbasics, hello world, intro, js basics

JavaScript's single-threaded, synchronous execution model. The call stack, execution context, and blocking behavior. Foundation for asynchronous JS patterns.