[1] Server Push and Server Hints - The Chromium Projects ( ( 版)) http://www.chromium.org/spdy/link-headers-and-server-hint
[2] LINK rel=subresource - The Chromium Projects ( ( 版)) http://dev.chromium.org/spdy/link-headers-and-server-hint/link-rel-subresource
[3] 859177 – Investigate link rel=subresource prefetching ( 版) https://bugzilla.mozilla.org/show_bug.cgi?id=859177
The intent of the subresource attribute on <link> was to prefetch a resource during a browser’s idle time. After a browser downloaded a page, it could then pre-download resources such as other pages so that when they were requested by users, they could simply be retrieved from the browser cache.
[5] Process subresource link headers by noamr · Pull Request #7691 · whatwg/html · GitHub, https://github.com/whatwg/html/pull/7691
[6] Process subresource link headers by noamr · Pull Request #1409 · whatwg/fetch · GitHub, https://github.com/whatwg/fetch/pull/1409
[7] Subresource link headers are implemented but not specified · Issue #8865 · whatwg/html · GitHub, https://github.com/whatwg/html/issues/8865