HTML: HyperText Markup Language | MDN

Overview of HTML (HyperText Markup Language)

• Definition: HTML is the fundamental building block of the Web, used to define the meaning and structure of web content.
• Core Technologies: While HTML handles structure, CSS is used for presentation (appearance) and JavaScript for functionality (behavior).
• Hypertext: Refers to the links that connect web pages, enabling navigation within and between websites.
• Markup Syntax:
  • Uses "elements" (e.g., <p>, <div>, <img>) to annotate content.
  • Elements are defined by "tags" enclosed in < and >.
  • Tags are case-insensitive, though lowercase is the recommended industry convention.
• Key Concepts:
  • Attributes: Additional values used to configure elements or adjust their behavior.
  • Global Attributes: Attributes that can be applied to any HTML element.
  • Content Categories: Rules defining which elements are allowed within specific contexts.
  • Comments: Use <!-- … --> to add notes or disable parts of the markup.
• Advanced Features:
  • Forms: Essential for user interaction (login, feedback, e-commerce) with built-in client-side validation.
  • Media: Native support for audio and video via <audio> and <video> elements.
  • Extensibility: data-* attributes allow for storing custom information on elements.
  • Metadata: Includes microdata and microformats to provide structured data for search engines and crawlers.
  • Responsive Design: Techniques for optimizing images and content across different screen sizes and resolutions.
• Learning Resources: MDN provides comprehensive documentation, including tutorials for beginners, a syntax cheatsheet, and full references for all elements, attributes, and input types.