JavaScript Documentation
Learn JavaScript from the basics to advanced techniques
Introduction to JavaScript
JavaScript is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB, and Adobe Acrobat.
JavaScript is a prototype-based, multi-paradigm, single-threaded, dynamic language, supporting object-oriented, imperative, and declarative (e.g., functional programming) styles. It is one of the core technologies of the web, alongside HTML and CSS.
JavaScript is a versatile programming language that powers the interactivity and functionality of modern web applications. It enables developers to create dynamic content, control multimedia, animate images, and much more. JavaScript is supported by all major browsers and is an essential skill for web developers.
JavaScript's ecosystem includes a wide range of libraries and frameworks, such as React, Angular, and Vue.js, which simplify the development of complex applications. Additionally, JavaScript is used in server-side development with Node.js, making it a full-stack language.
Getting Started with JavaScript
If you're new to JavaScript, we recommend starting with our JavaScript Basics guide. This will introduce you to the fundamental concepts of JavaScript, including:
- Variables and data types
- Operators and expressions
- Control flow (conditionals and loops)
- Functions and scope
- Objects and arrays
To begin your JavaScript journey, it's important to understand the basics. JavaScript can be written directly in HTML files or in separate .js files. Below is an example of how to include JavaScript in your HTML:
<!DOCTYPE html>
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<h1>Welcome to JavaScript</h1>
<button onclick="alert('Hello, World!')">Click Me</button>
<script>
console.log('JavaScript is running!');
</script>
</body>
</html>Once you're comfortable with the basics, explore topics like variables, functions, and control structures to build a strong foundation.
JavaScript Topics
Our JavaScript documentation covers a wide range of topics, from basic to advanced. Explore the following sections to deepen your understanding of JavaScript:
JavaScript is constantly evolving, with new features introduced in ECMAScript (ES) specifications. Modern JavaScript (ES6+) includes features like arrow functions, template literals, destructuring, and modules, which make coding more efficient and readable.
Additional Resources
In addition to our documentation, here are some valuable resources for learning JavaScript: