Specs to check:

• ARIA in HTML - Working Draft
• File API - Working Draft
• Clipboard API and events - Working Draft
• HTML Accessibility API Mappings 1.0 - Working Draft
• Input Events Level 1 - Working Draft
• Input Events Level 2 - Working Draft
• Intersection Observer - Working Draft
• Pointer Lock 2.0 - Working Draft
• Push API - Working Draft
• Selection API
• The Screen Orientation API
• UI Events - Working Draft
• Web App Manifest - Working Draft