[whatwg/fetch] Add a `prefetch` initiator (#659)

Closes #658
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/fetch/pull/659

-- Commit Summary --

  * Add a `prefetch` initiator

-- File Changes --

    M fetch.bs (8)

-- Patch Links --

https://github.com/whatwg/fetch/pull/659.patch
https://github.com/whatwg/fetch/pull/659.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/pull/659