If you're exploring the world of web development, understanding HTML, CSS, and JavaScript is crucial. These three technologies form the foundation of every web page you visit.

HTML (HyperText Markup Language)

HTML is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as CSS and JavaScript.

  • Structure: HTML provides the structure of a web page.
  • Elements: HTML elements like <h1> for headings, <p> for paragraphs, and <a> for links.
  • Attributes: Elements can have attributes to provide more information about the element.

Example of HTML:

<!DOCTYPE html>
<html>
<head>
    <title>My Web Page</title>
</head>
<body>
    <h1>Hello, World!</h1>
    <p>This is a paragraph.</p>
    <a href="/Documentation/en/Explore/Developer/HTML_CSS_JavaScript">Learn More</a>
</body>
</html>

CSS (Cascading Style Sheets)

CSS is a stylesheet language used to describe the presentation of a document written in HTML. CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.

  • Styling: CSS is used to style HTML elements.
  • Properties: CSS properties like color, font-size, background-color, etc.
  • Selectors: Selectors like h1, .class, #id, etc.

Example of CSS:

h1 {
    color: blue;
    font-size: 24px;
}

JavaScript

JavaScript is a programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has dynamic typing, prototype-based object-orientation, and first-class functions.

  • Interactivity: JavaScript adds interactivity to web pages.
  • DOM Manipulation: JavaScript can manipulate the Document Object Model (DOM) of a page.
  • Frameworks: Libraries and frameworks like React, Angular, and Vue.js are built on JavaScript.

Example of JavaScript:

document.addEventListener('DOMContentLoaded', function() {
    console.log('Document is ready!');
});

Conclusion

Understanding HTML, CSS, and JavaScript is essential for anyone looking to build a career in web development. These technologies work together to create the rich and interactive web pages we see today.

For more information on web development, check out our Web Development Tutorial.

HTML CSS JavaScript