"speculationrules" request destination missing

[domenic]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/Request/destination

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

MDN does a great job documenting the speculation rules API: https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API

However, it is missing the "speculationrules" request destination, which is used for requests issued from the Speculation-Rules HTTP header. (Which is documented.)

What did you expect to see?

Something like:

"speculationrules"
The target is a speculation rules JSON document

Do you have any supporting links, references, or citations?

Existing spec:

• https://wicg.github.io/nav-speculation/speculation-rules.html#fetch
• https://wicg.github.io/nav-speculation/speculation-rules.html#pending-external-speculation-rule-resource-fetch

The plan is to move this into HTML and Fetch:

• Add the "speculationrules" destination whatwg/fetch#1841
• Add speculation rules prefetch whatwg/html#11426

Do you have anything more you want to share?

No response

MDN metadata

Page report details

• Folder: en-us/web/api/request/destination
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/API/Request/destination
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/api/request/destination/index.md
• Last commit: 3e543cd
• Document last modified: 2025-06-23T16:41:39.000Z

[hamishwillee]

@chrisdavidmills You worked on that API right? Is this something you want to look at?

[chrisdavidmills]

@chrisdavidmills You worked on that API right? Is this something you want to look at?

Yup, I'll take this one.

@domenic, I'll issue a PR soon to fix this. I probably ought to add a BCD point to the destination page to show when this value was first recognized by the platform. When did you add it to Chromium?

[domenic]

Looks like Chrome 121

[chrisdavidmills]

Looks like Chrome 121

Thanks. I'll add a data point to BCD.

[chrisdavidmills]

Looks like Chrome 121

Thanks. I'll add a data point to BCD.

mdn/browser-compat-data#27296