Bug Description

Originally reported in support topic.

When adding <amp-experiment> to the page, the AMP plugin will automatically add the amp-experiment component script for version 1.0. This is a problem because the this version 1.0 of amp-experiment is itself still experimental. The current stable version is 0.1. This issue came up before for amp-carousel, when 0.2 was made available but was still experimental: when upgrading the spec we had to force amp-carousel to be pinned at 0.1. See #3084. At a later point we then rolled-back that pinning to 0.1 so that 0.2 could be used: #3700.

I’ve created a workaround plugin which can be used to roll back the amp-experiment component script from 1.0 to 0.1 until 1.0 is stable: https://gist.github.com/westonruter/092828765f25c312e380c567f48f56e7

It's not clear when v1.0 will be made stable so we should probably implement the same pinning to v0.1 which we did for amp-carousel .

We may put this fix into the AMP plugin as well. I missed this amp-experiment version update when updating the spec so I’ll make a note of looking out for this in the future.

Originally introduced here (a year ago): https://github.com/ampproject/amp-wp/pull/2297/files#r416008874.

For tracking issue to make amp-experiment v1.0 stable, see ampproject/amphtml#21705.

Expected Behaviour

amp-experiment v0.1 should be added to the page not v1.0.

Steps to reproduce

Add <amp-experiment> to the page.

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry