I2I: amp-next-page v2

[wassgha]

Summary

This is the second phase of #25500 , proposes a second version of the amp-next-page component that breaks the initial API in order to allow for true infinitely scrolling AMP documents as well as substantial fixes to the initial extension.

Design document

Design document

Motivation

The status quo is that amp-next-page v1 is launched as doc-level opt-in only (but is significantly in usage) and only provides next document loading up to three "next documents". Demand dictates a truly infinite document loading experience as well as multiple fixes to the extension and a simpler API (see #24889 ). Since the API changes would be breaking (and given that amp-next-page v1 never launched in a production ready state), it might be appropriate to launch as v2 (either 0.2 or 1.0) once all issues are fixed and the API is final.

Additional context

More context in the design doc, the master issue and an external contribution at #24889 . Partially started implementation under #25636 .

Launch tracker

Launch tracker

[davidstrauss]

Can you please make this design document accessible to the public?

[davidstrauss]

The launch tracker document appears to need a publicly accessible version as well.

[kristoferbaxter]

I was able to access the design document from a non-logged in account, was this changed after design review?

[wassgha]

I had an issue with my amp.dev account but I was able to resolve it right before the meeting. No worries though, I'll continue working on this and implement changes if needed after the next meeting.