beginner Level • Chapter 01 of 15
HTML5 Introduction & Document Anatomy
Understand doctype declarations, HTML tags, head/body division, and DOM trees.
What is HTML5?
HTML (HyperText Markup Language) is the standard markup language used to build the skeleton of all web pages worldwide. Unlike programming languages that calculate logic, HTML uses tags to structure text, images, forms, and multimedia so browsers know how to render them.
- •Tags: Elements enclosed in angle brackets like <p> and </p>. Most tags require opening and closing pairs.
- •Attributes: Additional modifiers provided in opening tags (e.g., id, class, src, href).
- •DOM (Document Object Model): The memory tree generated by the browser when parsing HTML.
The Standard HTML5 Boilerplate
Every modern HTML document begins with <!DOCTYPE html> followed by the <html>, <head>, and <body> hierarchy.
Hands-On Code Examples & Sandbox
1 ExampleCode SandboxExample: HTML5 Introduction & Document Anatomy
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Key Concepts • Chapter 01
- •Always declare <!DOCTYPE html> at the very top of your file to enforce modern standards mode.
- •The <head> section contains invisible metadata, character encodings, and external links.
- •The <body> section contains all user-visible headings, paragraphs, and components.
🎯 Chapter Practice Challenge
Open the editor, change the heading text to your name, and add a second paragraph describing your dream tech career.
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