Preload types

[tunetheweb]

Summary

Chrome is noted as only having partial support as not supporting certain types (added in #9578) but this is actually true of all browsers so incorrect to label Chrome as only having partial support. See this example test as evidence. In fact Firefox supports one less type (track) than Chrome (but raised).

Our choices are:

• Label all browsers as having partial support.
• Update Chrome to having full support and note in the docs that only certain types are supported (this is covered in Update link rel preload to reflect browser support content#32740).

I've chosen to go with the second option as browsers seem fairly consistent here and I don't think marking all as partial support is particularly helpful. But open to changing that if you think we should do the other way.

I've also NOT marked Firefox as having partial support as I think the lack of track support is a minor thing. I have added a note to that effect though.

Test results and supporting details

See example here: https://resource-loading-examples.glitch.me/preload-types.html
(tested in Chrome 123, Firefox 123, and Safari 17.4)

Related issues

Content update here: mdn/content#32740
Also raised a spec discussion here: whatwg/html#8332 (comment)

And a caniuse request here: Fyrd/caniuse#7006

[Elchi3]

Thanks, I think another option would be to have sub features for all of the preload types. For now, this seems good to me, though.

[tunetheweb]

Thanks, I think another option would be to have sub features for all of the preload types. For now, this seems good to me, though.

Good idea. Raised #22728