The AMP Project Roadmap

What was accomplished

• Prototypes created for mixed-length and streaming carousel types
• Accordion: a11y support and styling.
• Accordion: work started on imperative APIs.
• Video iframes and YouTube components are code complete.
• Started lightbox components. Presented in design review.
• Replacing viewportCallback with IntersectionObserver throughout the runtime.

Lessons learned

What's next

• Continue work on video docking
• Continue work on stream and mixed-length carousel types.
• Continue work on lightbox components.
• Continue work on accordion imperative APIs, a11y, and structure.
• Support media-query attributes.

What was accomplished

• Design work has started on the AMP/JSX templates.
• YouTube component is in progress.
• More carousel features added such as controls and snapping.
• DateCountdown component - code-complete.
• Accordion: animations done.
• amp-img SSR is launching and collecting metrics.
• Instagram component completed.
• Aspect ratio supported for layout=responsive. Unfortunately, it doesn't work for layout=intrinsic.
• Did some evaluations and filed bugs on Goober - a potential alternative for JSS.

Lessons learned

• Animations could potentially be easier solved with Web Animations API. The big benefit is that some CSS properties can be easier managed for setup and cleanup as the keyframes definition.

What's next

• Video docking.
• StreamGallery component.
• Complete accordion features.
• Make decision on auto-envelope for dev preview.
• LIghtbox components.
• Start reducing AMP Runtime reliance on the measuring code.

What was accomplished

• amp-video complete.
• MediaSession support for videos: close to be done.
• VideoIframe component has been started.
• Loading model is redone via loading prop.
• layout=responsive implementation via aspect-ratio CSS completed
• social-share: fixed error handling
• social-share: refresh of all styles and icons completed
• date-countdown: AMP mapping in progress
• JSS support has been completed on the infra side.
• finished analysis for JSS competitors: Emption, Goober, and Aphrodite.
• Instagram: code complete, tests WIP.
• Improved AMP mode in the storybook to make parameter selections sticky.
• Shadow DOM support: automatically discover slot distribution changes.
• Multi-attribute parsing supported where different input formats can map to a single Preact prop.
• Fixed Closure bugs on destructured property typing.
• Auto-envelope experimentation in progress to execute extensions w/o v0.js.

Lessons learned

What's next

• Working on dev preview launch plans.
• Start templates-via-JSX design.
• Start YouTube component.
• Start Accordion component.
• Complete date-countdown and instagram support.

What was accomplished

• Initial amp-inline-gallery and amp-inline-gallery-pagination completed.
• Improved style propagation from Web components to Preact components.
• Started experimentation with auto-envelope for Bento: a smaller custom-element wrapper that could allow us to run Bento components w/o runtime.
• amp-date-countdown design and initial work on Preact component completed.
• JSS support completed and ready for use.
• Completed design review for ad-frame components (amp-facebook-comments and amp-twitter).
• Prototyping completed for ::part CSS.

Lessons learned

• Using fake timer when testing Preact has to be done very carefully to avoid "stuck" global queues. Always call clock.runAll() in afterEach. A more stable solution is in research.
• The ::part CSS could be very natural for Bento. However, our typical markup is incompatible with it and would need to be changed. However, that often limits some of the CSS/markup that we've been using.

What's next

• Review light-DOM components, especially template-based ones.
• amp-instagram support.
• amp-date-countdown AMP/Bento bindings.
• Working on "developer preview" plans.

What was accomplished

• Video Manager Preact implementation in review
• New Bento Storybook mode deployed to @ampproject/storybook-addon
• Mutation Observer system imlpemented
• Supported declarative shadow DOM spec (proof of concept)
• Started work on auto-eveloped extensions prototype
• JSS supported for Bento components and recompiled for AMP mode.
• Imperative API support

Lessons learned

What's next

• JSS design review on Sep 2nd
• Inline gallery Bento implementation
• amp-date-countdown Bento implementation
• Continue video manager work

What was accomplished

• Started Video Player implementation
• Started work on advanced carousel components: inline-gallery and streaming-gallery
• Context API: subscriber and component APIs in review
• CSS design ready based on JSS framework
• Model for container wrappers based on the contain CSS as an alternative to AMP's layouts.
• amp-img SSR work in progress.
• Main social-share redesign complete with more advanced customization.
• New embedding mode with non-empty passthrough when a shadow DOM is given a slot only when children are available. This allows us to support text nodes as well as elements as children.
• Renewed focus on unit and integration testing of both: Preact and AMP elements.

Lessons learned

• Our carousel ecosystem is very advanced.
• How useful display:none in React world?

What's next

• Start using Context API
• Storybook: Bento mode that does not reload the whole AMP page.
• Continued progress on advanced carousels
• Continued progress on video players
• Prototype auto-enveloped extensions that can run without v0.js
• CSS implementation for components and shadow DOM.

What was accomplished

• Context API introduced to AMP for discovery phase, value propagation in progress
• Using externs to define types for props, allowing direct prop access and destructuring in components
• amp-social-share:
  • update experiment name
  • design documentation
  • configurable color and backgroundColor for preconfigured providers
• Video players design
• amp-base-carousel:
  • Initial Preact implementation with looping and smooth scrolling
  • AMP layer and default arrow UI in progress

What's next

• Continued progress on Context API
• Add passthrough-non-empty for amp-social-share
• Continued progress on Carousel
• Prototype video players
• Prototype extension "auto-envelope" for Bento and AMP modes

What was accomplished

• Teams were off on FixIt. So limited progress.
• Intersection observer polyfill fully launched. But some research regarding possibly duplicate firings.

What's next

• Start video work
• More progress on carousels
• More progress on context propagation
• More progress on social share

What was accomplished

• IntersectionObserver polyfill goes live this week. But it can't be yet relied on 100% until inabox launch happens.
• amp-selector and amp-fit-text are in.
• fixed long-standing layout bugs for text content and unupgraded elements.
• layout=responsive support in Bento
• amp-social-share: working on a better boundary between the component and AMP.
• Work started on the context propagation design
• Aspect-ratio CSS: functional in the Chrome Dev. Looking for cross-browser solutions.

Lessons learned

• At least in case of amp-fit-text, there are significant improvements to the Web Component with the new model both in terms of functionality and UX. So there are many improvement opportunities over the current state.

What's next

• amp-carousel
• Additional code-style improvements are on the way, such as unquoted props support.
• Storybook addon for AMP is being released as a separate package.

What was accomplished

• IntersectionObserver polyfill code in PROD. Monitoring for launch.
• SocialShare: an updated component API.
• AmpSelector: active progress.
• AmpFitText: active progress.

Lessons learned

• Switching to major-version bump for all bento components.
• Balance between keeping the old code and fixing the legacy issues. For instance, AmpSocialShare has a config that always requires asynchronous rendering. Or AmpFitText over-nests DOM elements and provides an extra z-index layering.

What's next

• We will soon cover all unique component types and can focus on performance and quality.
• Display locking: migrate to new Chrome API.
• Aspect ratio CSS: active collaboration with Chrome team to get it done.
• React context and DOM tree.
• ResizeObserver polyfill.

What was accomplished

1. IntersectionObserverPolyfill: code complete for AMP/shadow/bento modes. In 0.5% binary experiment.
2. IntersectionObserverPolyfill for inabox: in review.
3. Some disruption to the team for UI, Mauve, and animation/streams work streams. Trying to minimize disruption.
4. Display locking: original trial launch work for SCS in review.
5. Revisiting amp-social-share component: need to improve the code distribution between the React and Web components.
6. Working on amp-selector and detached model for React/Web-component mapping.
7. Performance research on DOM tree parent search for context propagation.

Lessons learned

1. IntersectionObserverPolyfill: design review to follow.
2. Storybooks very quickly demonstrates API problems and inconsistencies.
3. Some major performance changes for DOM tree parent navigation observed comparing to the original measurements several years ago. To be published soon.

What's next

1. IntersectionObserver: code complete and launching started for all modes.
2. amp-social-share revisit
3. Display-locking launch
4. amp-selector
5. React context support: start development work.

What was accomplished

1. Some disruption for Bento team due to performance work and stories work.
2. Good progress on amp-selector. In review.
3. amp-accordion renderSubtree version is in the launch pipeline.
4. The universal IntersectionObserver in review. IntersectionObserver polyfill improvements are in the review with the w3c owners.
5. Storybook testing is integrated into Bento.
6. Slow, but some progress on the overall styling strategy for components, including structural (mandatory) and stylistic (optional) styles.

Lessons learned

1. The state of stylesheets for components is still very not great on the Web today.

What's next

1. Form integration for amp-selector
2. React context propagation in DOM
3. Video system component design/prototyping
4. Continue progress on IntersectionObserver, amp-selector, renderSubtree launch, etc.