Affect of loading and fetchpriority on each other

[aarontgrogg]

Hi. Awesome collection of info!

Have been wanting to dive into this myself, but no time; now you saved me a bunch! :-)

Something I wanted to test, not sure if you/others have already: What affect, if any, do the loading and fetchpriority attributes have on each other?

Examples:

• <img loading="eager" fetchpriority="low"...>
• <img loading="lazy" fetchpriority="high"...>
  Or:
• <img loading="eager" decoding="async"...>
• <img fetchpriority="high" decoding="async"...>

All examples are definitely problematic and are not what people should be doing, but it is also quite likely that someone could/will make such mistakes.

Do browsers set priorities so that one would "override" the other, or does it just create a massive traffic jam?

Thanks in advance to anyone with answers!