wg-runtime Quarterly Status Update 2019-06

[jridgewell]

What's been accomplished?

Framework

• Removed DOM Purify from 2 binaries (unexpected bundlings)
• Calculating documentHeight correctly for embeders
• Removed AMP-CORS (thanks Dima!)

Layers

• Found bug with cached resource layoutBox not refreshing
• Looking into exponential DOM calls during initial render (final perf regression?)

amp-script

• Framework support matrix to figure out what's missing
• worker thread set innerHTML support
• Refactored sanitization
• Basic Canvas Support
• Security Review
• Origin trail launch!

Fixed Layer

• Support for elements inside lightbox
• Almost disabled transfer in iOS

1-pass compilation

• Working on importing types without actually importing code
• Closure team may force shared dependencies deeper into output modules
  • If not, we'll prepend intermediate dependency modules onto the output modules

AMP Cache Server

• New stale-while-revalidate values for our JS files
• Priority Hints and <link rel=preload> placement experiments
• Blurry image placeholder in testing

What's next?

• Address all Runtime Survey Feedback
• Fix pref regressions and launch Layers
• Advanced Canvas support in amp-script
• Use only 1-pass compilation
• Move to Custom Elements v1 polyfill, drop v0

Bento AMP

• Completely reworking service dependency system
• Making AmpDoc less confusing, more like regular document
• Gain consensus on integration with external frameworks