What was accomplished

• amp-accordion:
  • external API restructure
  • accessibility attributes
• amp-base-carousel snap-align feature to view slides either at start or center of carousel viewport
• amp-lightbox initial implementation
• amp-selector:
  • keyboard-select-mode feature for Arrow key navigation and selection configuration
  • Preact unit tests
• Ongoing fixes for resource loaders and intersection observers
• Imperative API design and discussion
• Documentation written for amp-instagram, amp-youtube, amp-lightbox
• Removed viewportCallback from BaseElement
• PR deploy bot integration with Storybook

Lessons learned

• You can run Preact Devtools in Storybook by adding import 'preact/debug'; to the start of the story.
• We make sure hidden is display:none in AMP but it is much more fragile (overridable) to use it in Bento mode.

What's next

• Finalizing dev preview feature set and planning for beta
• Continued progress on imperative API
• amp-accordion:
  • display locking
  • final touches
• amp-base-carousel:
  • e2e tests
  • orientation feature to configure the carousel as horizontal or vertical scrolling
  • dir="rtl" support
• amp-selector integration with forms