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HTML Basics

Introduction to HTMLHTML Document StructureHTML ElementsHTML AttributesHTML HeadingsHTML ParagraphsHTML Text FormattingHTML CommentsHTML LinksHTML ImagesHTML ListsHTML TablesHTML Blocks and Inline ElementsHTML ClassesHTML IdHTML IframesHTML File PathsHTML HeadHTML Layout ElementsHTML Responsive Web Design

HTML Forms and Input

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HTML5 Features

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HTML Advanced Topics

HTML EntitiesHTML SymbolsHTML EmojisHTML CharsetHTML URL EncodeHTML XHTMLHTML Style GuideHTML vs. XHTMLHTML AccessibilityHTML Best PracticesHTML SEO BasicsHTML MetadataHTML Responsive ImagesHTML Picture ElementHTML FaviconHTML Performance Optimization

HTML and Other Technologies

HTML and CSSHTML and JavaScriptHTML DOMHTML EventsHTML Web ComponentsHTML TemplatesHTML Custom ElementsHTML Shadow DOMHTML MicrodataHTML and XMLHTML and JSONHTML and ARIAHTML and SVGHTML and MathML

HTML Tools and Resources

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HTML Images

Images are an essential part of web design, enhancing visual appeal and conveying information. HTML provides a simple way to embed images using the <img> tag.

Basic Syntax

The <img> tag is a self-closing element that requires no closing tag. It uses the src attribute to specify the image source:

<img src="image-url.jpg" alt="Description of the image">

Important Attributes

  • src: Specifies the path to the image file (required)
  • alt: Provides alternative text for accessibility (required)
  • width: Sets the width of the image in pixels
  • height: Sets the height of the image in pixels

Example Usage

Here's an example of an image with alternative text and dimensions:

<img src="sunset.jpg" alt="Beautiful sunset over the ocean" width="300" height="200">

Best Practices

  • Always include descriptive alt text for accessibility and SEO
  • Optimize images for web to reduce load times
  • Use appropriate file formats (JPEG for photographs, PNG for graphics with transparency)
  • Consider using responsive images for different screen sizes

Image Formats

Common web image formats include:

  • JPEG: Best for photographs and complex images
  • PNG: Ideal for graphics, logos, and images with transparency
  • GIF: Suitable for simple animations and graphics with limited colors
  • SVG: Perfect for scalable vector graphics and icons

Advanced Techniques

For more control over image display, consider using the HTML picture element. This allows you to specify multiple image sources for different screen sizes or device capabilities.

Accessibility Considerations

Ensure your images are accessible to all users:

  • Use meaningful alt text that describes the image content
  • For decorative images, use an empty alt="" attribute
  • Consider using aria-labelledby for complex images that require longer descriptions

SEO Impact

Images can significantly impact your website's SEO. To optimize images for search engines:

  • Use descriptive file names (e.g., "red-sports-car.jpg" instead of "IMG001.jpg")
  • Include relevant keywords in the alt text
  • Optimize image file sizes to improve page load speed

By following these guidelines, you can effectively use images in your HTML documents to create visually appealing and accessible web pages.

Related Concepts