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HTML Basics

HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of websites.

Key features include:

• Semantic elements for better structure
• Support for multimedia
• Form handling capabilities
• Accessibility features

Cascading Style Sheets

CSS is used to style and layout web pages — for example, to alter the font, color, size, and spacing of your content, split it into multiple columns, or add animations and other decorative features.

CSS can be applied through:

• Inline styles
• Internal stylesheets
• External stylesheets
• CSS preprocessors (SASS, LESS)

Adding Behavior with JavaScript

JavaScript enables interactive web pages and is an essential part of web applications. It can be used in web browsers to improve the user interface and detect user interactions.

Common uses:

• DOM manipulation
• Event handling
• AJAX requests
• Form validation
• Animations and effects

Development Guidelines

Following best practices ensures that your web projects are maintainable, performant, and accessible to all users.

Essential practices:

• Write semantic HTML
• Keep CSS organized and DRY
• Test across browsers
• Optimize for performance
• Ensure mobile responsiveness
• Implement proper accessibility