Glossary of Terms for JavaScript Developers

• Array: An object used to store multiple values in a single variable. Array - JavaScript | MDN

• Boolean: A logical entity that can have two values, true or false. Boolean - JavaScript | MDN

• Callback: A function that is passed into another function as an argument to be executed later. Callbacks - JavaScript | MDN

• Closure: A function that has access to its own scope, the outer function's scope, and the global scope. Closures - JavaScript | MDN

• DOM (Document Object Model): An API that allows JavaScript to interact with HTML and CSS, representing the structure of web pages. DOM - Web APIs | MDN

• ECMAScript (ES): A standard for scripting languages. JavaScript is a dialect of ECMAScript. ECMAScript - JavaScript | MDN

• Event: Something that happens to an HTML element that JavaScript can respond to, such as a click, hover, or key press. Events - JavaScript | MDN

• Function: A reusable set of instructions that can be called anywhere in your code. Functions - JavaScript | MDN

• JSON (JavaScript Object Notation): A lightweight data-interchange format that is easy to read and write for humans and machines. JSON - JavaScript | MDN

• Promise: An object that may produce a single value some time in the future with either a resolved value or a reason that it's not resolved (rejected). Promise - JavaScript | MDN

• Prototype: An object from which other objects inherit properties. Prototype - JavaScript | MDN

• Scope: The context in which values and expressions are "visible" or can be referenced. Scope - JavaScript | MDN

• Strict Mode: A way to opt into a restricted variant of JavaScript to catch more errors and unsafe syntax. Strict Mode - JavaScript | MDN

• Variable: A name that can be assigned to a value to be used in the code. Variable - JavaScript | MDN

• Object: A value in memory to which the variable points. It contains properties, stored as key-value pairs. Object - JavaScript | MDN

This list is not exhaustive and the world of JavaScript is always evolving, but understanding these key terms is a crucial step in your JavaScript journey.