Master the art of responsive images to deliver optimized visuals across all devices and screen sizes. Learn modern techniques for efficient image delivery in web development.
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Key Responsive Image Techniques
- Srcset and sizes attributes
- Picture element usage
- Art direction
- Resolution switching
- Responsive breakpoints
Implementation Example
<picture>
<source
media="(min-width: 800px)"
srcset="hero-large.jpg 1200w,
hero-medium.jpg 800w"
sizes="80vw">
<source
media="(min-width: 400px)"
srcset="hero-small.jpg 400w"
sizes="100vw">
<img src="hero-fallback.jpg" alt="Hero image">
</picture>Best Practices for Responsive Images
1. Resolution Switching
- Use srcset for multiple resolutions
- Define appropriate sizes attribute
- Provide fallback options
- Consider pixel density
2. Art Direction
- Crop images for different viewports
- Adjust image focus points
- Maintain visual hierarchy
- Optimize for mobile first
Performance Impact
- Reduced bandwidth usage
- Faster page load times
- Better user experience
- Improved SEO rankings
Common Pitfalls to Avoid
- Oversized images for mobile
- Missing fallback images
- Incorrect breakpoint choices
- Poor image quality at breakpoints
- Insufficient testing across devices