Intent to Implement: Fetch API: keepalive

[Yutaka Hirano]

Contact emails yhi...@chromium.org Spec 

https://fetch.spec.whatwg.org/#ref-for-dom-request-keepalive

Design Doc

https://docs.google.com/document/d/1iHJtFa3jOo5n9QXHb6Ok5nK8kavXSk2DrLoubPWi9ys/edit#

Summary & Motivation This option instructs fetch() to perform resource fetching with the keepalive flag set for non-blocking event reporting, analytics, etc.

This feature is useful for persisting page data to the server after the page has been closed for navigation or other reasons. It provides a more flexible and general alternative to the SendBeacon API.

Debuggability

No devtools support is needed.

Interoperability risk Firefox: No public signals Edge: No public signals Safari: In development Web developers: No signals

Compatibility risk There is no chance for this feature to break existing content.

Ongoing technical constraints None.

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? Yes or no. Yes.

OWP launch tracking bug https://crbug.com/695939 Link to entry on the Chrome Platform Status https://www.chromestatus.com/features/5760375567941632 Requesting approval to ship? No.