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According to the results presented above, we can conclude that JXL is the superior format for both lossy and lossless operations. That is clear by only looking at the results, but we can also have a look at the features of each format. Some of them are very important.
What does the image decoding attribute actually do?
So use it on your `` elements if you want. It's maybe good that image components for libraries use this, or that platforms like WordPress set it by…
Cropping Images with CSS While Keeping a Focal Point in the Center
This is a lovely way to deal with image crop and focal point with CSS only! 😍 And I love that Johannes put this warning in the beginning: While client-side…
New Recommendations for Ecommerce Images
For ecommerce companies—particularly for those selling apparel—it likely makes sense to prioritize image quality above file size. This is a really…
Apparently, an image whose part above the fold is indeed the largest, but of which only a small part can be seen, can be considered an LCP element, even if another image has a larger part visible... 😭
You can see this for my photography site in this WebPageTest result:
https://www.webpagetest.org/vitals.php?test=230606_BiDcN4_4NJ&run=3&cached=0#lcp
Looks like we will soon have JPEG XL in Safari! 🥳
Toni Sagristà 
Barry Pollard
Johannes Odland
Jason Grigsby