Introduction
Serving a 2000px image to a 300px mobile screen is a performance crime. Responsive images solve this by serving tailored sizes.
Techniques
1. Resolution Switching
Use srcset to provide a list of available image versions to the browser.
2. DPR Awareness
Handle Retina displays (2x, 3x) by providing higher density versions.
3. Art Direction
Use the <picture> tag to crop or change images for mobile vs desktop views.
Conclusion
Smart images make for a fast web. Use responsive techniques to save data and improve UX.
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