Every website you visit—from simple blogs to complex web applications—relies on HTML as its core foundation. HTML (HyperText Markup Language) defines the structure and layout of web content, telling browsers how to display text, images, forms, and interactive elements.
flowchart LR
A["HTML (Structure)"] --> B["Browser Engine"]
C["CSS (Styles)"] --> B
D["JavaScript (Logic)"] --> B
B --> E["Interactive Web Page"]
Think of a web application like a house:
Without HTML, browsers have no structure to display or render.
HTML uses tags enclosed in angle brackets (<tagname>) to mark up content. Most tags come in pairs: an opening tag <tag> and a closing tag </tag>.
Here is the standard document skeleton every web page starts with:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My First Web Page</title>
</head>
<body>
<header>
<h1>Welcome to Web Development</h1>
</header>
<main>
<p>HTML organizes text, links, and media into readable structures for browsers and search engines.</p>
</main>
</body>
</html>
<!DOCTYPE html>: Tells the browser to render the page using the modern HTML5 standard.<html>: The root container for all elements on the page.<head>: Holds invisible page metadata, page titles, character encodings, and external stylesheet links.<body>: Holds all visual content displayed to the user (headings, paragraphs, images, buttons).<meta charset="UTF-8">: Without proper character encoding, special characters (like emojis or foreign accents) render as broken symbols.<p>, <div>). While HTML is case-insensitive, lowercase is the universal industry convention.<!DOCTYPE html>: Omitting the doctype forces browsers into "quirks mode," causing unpredictable layout rendering bugs across browsers.Create your own index.html file in VS Code or your preferred code editor, add a main heading (<h1>) and a short introduction paragraph (<p>), then open it directly in your web browser to test!
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