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Spec
Multiple image definition discussion
Summary
With multiple image definitions the browser can select the most appropriate image to display, balancing factors like screen density, memory, and bandwidth. This avoids loading images that are larger than necessary, and enables web developers to customize icon design for different sizes e.g. reducing detail for smaller sizes.
Motivation
Multiple image definitions help save memory and bandwidth and make it easy to use the best icon design for the current screen size and density.
Interoperability and Compatibility Risk
Low risk. Providing multiple images is optional. Chrome will be the first browser to implement this.
Ongoing technical constraints
None.
Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?
Yes, it will be supported on all platforms where we support notifications (currently Windows, Mac, Linux, Chrome OS and Android).
OWP launch tracking bug
Link to entry on the feature dashboard
https://www.chromestatus.com/features/5754590205050880
Requesting approval to ship?
No, the spec discussion is still settling, and we intend to help resolve that using implementation experience.