What was accomplished

New Features

• <amp-experiment> support mutating class attribute PR
• Introduce requestOrigin to <amp-analytics> requests config fields. Issue
• Introduce $EQUALS macro support in <amp-analytics> Issue
• Convert all Analytics vendor config from js file to json file. This is part of the effort to lazily load analytics vendor configs.
• Change Analytics Linker's default behavior to decorate all subdomains
• Introduce $COOKIE macro support in <amp-analytics> Issue
• Allow setting custom cookie expiration time when setting cookie with <amp-analytics>'s cookie config Issue

Bug Fixes

• Fix regression where Analytics Linker decorate fragment url
• Fix a race condition when resolving performanceTiming.loadEventEnd [PR] (Fix race condition when resolving performanceTiming.loadEventEnd amphtml#22812)
• Fix race condition where video-percentage-played doesn't trigger Issue
• Fix nested macro expansion bug Issue

What is next

• <amp-experiment> v2 to support selecting multiple elements
• <amp-experiment> v2 to support mutating style and src attribute
• Lazily load analytics vendor config