Is it possible to progressively enhance image quality while zooming in safari mobile
I want to use it in mobile browser, but a desktop solution will do too
I don't know any plugin to do this, but it's quite easy in theory :
To know the zoom in mobile Safari, you only have to check this ratio : document.body.clientWidth / window.innerWidth.
Then, it's only a matter of choosing the right event to listen to (resize, or maybe a touch event), to check for this zoom level and to replace your img.