Intent to Prototype: Speculation Rules
Jeremy Roman
Contact emails
Explainer
https://github.com/jeremyroman/alternate-loading-modes/blob/main/triggers.md
Specification
https://jeremyroman.github.io/alternate-loading-modes/#speculation-rules
Summary
Flexible syntax for defining what outgoing links are eligible to be prepared speculatively before navigation (e.g. prefetching, prerendering). Enables access to additional enhancements, such as use of a private prefetch proxy, where applicable.
Blink component
Motivation
Enable additional avenues of development for pre-navigation speculation, including requiring the anonymization of the client IP address and heuristics to identify the best outbound links to prefetch.
The platform and browser should help developers make the best use of these capabilities to accelerate navigation between pages.
Initial public proposal
https://github.com/WICG/proposals/issues/2
TAG review
https://github.com/w3ctag/design-reviews/issues/611
TAG review status
Pending
Risks
Interoperability and Compatibility
The proposal is designed with forward compatibility in mind, and intends to be flexible enough to support future needs. There are no anticipated backward compatibility risks.
There is significant interoperability risk to the extent other vendors may not take the same direction, which is mitigated to some extent by the fact that this feature is a form of progressive enhancement (i.e., it is not anticipated that any site will break if this feature is not supported, but may simply experience higher latency on navigation).
Feedback on the API is, of course, welcome.
Gecko: No signal (not yet requested)
WebKit: No signal (not yet requested)
Web developers: No signals
Is this feature fully tested by web-platform-tests?
No, though we intend to add WPT coverage as this proceeds. (It will likely need testdriver hooks to fully test.)
Tracking bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1173646
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5740655424831488
This intent message was generated by Chrome Platform Status.