2022 content notes

Use this page to jot notes for content to include in the 2022 edition. This page can be useful for 2021 content teams to leave notes for future stewards of their chapter or for any contributors to preserve ideas based on noteworthy developments throughout the year.

How to add a new note:

Add the chapter corresponding to the note, if it's not already listed.
- Chapters should be in their 2021 order.
- If the content doesn't correspond to an existing chapter, come up with a chapter name and add it to the section that best fits.
Add the note below its respective chapter.
Annotate the note with your username.

Part I. Page Content

Chapter 1: CSS

[rviscomi] Container queries

Part II. User Experience

Chapter 10: Performance

[rviscomi] Chrome's back/forward cache
- Chrome released a change in January that made more sites eligible for bfcache, which explains the improvement to the percent of origins with good CLS
- Possible new areas of exploration: how many sites are ineligible for bfcache? why? what are the most prevalent 3Ps that disqualify sites from bfcache? (see no-unload-listeners Lighthouse audit)

Chapter 11: Privacy

[cqueern] Adoption of Onion-Location Header
- Just learned there's an HTTP header a site can use to advertise that it's got a corresponding site available as a tor onion site. Would be interesting to see how many times that header is found in HTTPArchive crawls over time. Optionally this functionality is also available via an HTML meta tag as well.