It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino and Node. Using a modular script loader like RequireJS will improve the speed and quality of your code.

As you have seen in the previous examples, JavaScript functions are defined with the function keyword. Functions can also be defined with a built-in JavaScript function constructor called Function().

Jul 8, 2025 · A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some input and …

4 days ago · Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.

JavaScript is a high-level, often just-in-time–compiled language that conforms to the ECMAScript standard. [12] It has dynamic typing, prototype-based object-orientation, and first-class functions. It is …

Aug 5, 2025 · JavaScript is a powerful and flexible programming language for the web that is widely used to make websites interactive and dynamic. JavaScript can also able to change or update HTML …

Want to learn all about JavaScript functions? Learn how to write a function, how to use it, and why you should use them in your JavaScript code today!

Jan 15, 2026 · JavaScript is a versatile, dynamically typed programming language that brings life to web pages by making them interactive. It is used for building interactive web applications, supports both …

Sep 11, 2025 · JavaScript (JS) is a lightweight, interpreted scripting language that creates dynamic and interactive content on websites. It handles everything from simple animations and interactive maps to …

5 days ago · By examining lots of examples, you will learn how to make use of JavaScript in your own Web pages, and through these examples you will learn some new coding practices for writing …