Add CHIPS docs

[chrisdavidmills]

Description

This PR adds documentation for Cookies Having Independent Partitioned State (CHIPS)

See my research document for more information about this feature.

Motivation

Additional details

Related issues and pull requests

Fixes #23485

[github-actions]

Preview URLs (9 pages)

• /en-US/docs/Web/API/CookieStore/delete
• /en-US/docs/Web/API/CookieStore/getAll
• /en-US/docs/Web/API/CookieStore/get
• /en-US/docs/Web/API/CookieStore/set
• /en-US/docs/Web/API/Document/cookie
• /en-US/docs/Web/HTTP/Cookies
• /en-US/docs/Web/HTTP/Headers/Set-Cookie
• /en-US/docs/Web/Privacy/Partitioned_cookies
• /en-US/docs/Web/Privacy

Flaws (2)

Note! 7 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/API/CookieStore/set
Title: CookieStore.set()
Flaw count: 1

• macros:
  • /en-US/docs/Glossary/serialize redirects to /en-US/docs/Glossary/Serialization

---

URL: /en-US/docs/Web/Privacy/Partitioned_cookies
Title: Cookies Having Independent Partitioned State (CHIPS)
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: http.headers.Set-Cookie.Partitioned

External URLs (8)

URL: /en-US/docs/Web/API/CookieStore/getAll
Title: CookieStore.getAll()

• https://web.dev/samesite-cookies-explained/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/CookieStore/get
Title: CookieStore.get()

• https://web.dev/samesite-cookies-explained/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/CookieStore/set
Title: CookieStore.set()

• https://web.dev/samesite-cookies-explained/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/Privacy
Title: Privacy, permissions, and information security

• https://developer.chrome.com/docs/privacy-sandbox/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/Privacy/Partitioned_cookies
Title: Cookies Having Independent Partitioned State (CHIPS)

• https://developer.chrome.com/docs/privacy-sandbox/chips/ (1 time) (Note! This may be a new URL 👀)
• https://github.com/WICG/first-party-sets (1 time) (Note! This may be a new URL 👀)
• https://github.com/privacycg/CHIPS (1 time) (Note! This may be a new URL 👀)
• https://web.dev/same-site-same-origin/ (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2023-01-23 07:39:31)

[DCtheTall]

In Chrome we also added partitioned cookie support to the CookieStore API, do we want to include those changes in this PR as well?

[chrisdavidmills]

Thanks for the review comments, @DCtheTall ! I've made the changes as suggested.

As for the updates to the CookieStore API, I'm assuming you are talking about the changes listed here: https://github.com/privacycg/CHIPS#cookiestore-api ? I could include them in the PR, but I've got a few questions first:

1. Are they in a spec anywhere? I can't see them specified in https://wicg.github.io/cookie-store/.
2. Are the proposals listed in the explainer actually equivalent to the final updates, or are there further updates to consider?
3. What version of Chrome are they set to be released in? The same one as the rest of the CHIPS updates?
4. Is there a ChromeStatus entry for these updates, or are they being dealt with in the same one as the rest of the CHIPS updates?

[DCtheTall]

Hey @chrisdavidmills, to answer your questions:

1. I opened a PR against the spec, Add support for partitioned cookies to CookieStore. WICG/cookie-store#206
2. Yes, the changes in the explainer reflect the realized Chromium implementation.
3. The CookieStore changes are umbrellaed under the entire partitioned cookies feature, there is no separate flag/control for the CookieStore.
4. Same answer as 3, CookieStore changes are part of the larger partitioned cookies feature.

[chrisdavidmills]

Hey @chrisdavidmills, to answer your questions:

1. I opened a PR against the spec, [Add support for partitioned cookies to CookieStore. WICG/cookie-store#206](https://github.com/WICG/cookie-store/pull/206)

2. Yes, the changes in the explainer reflect the realized Chromium implementation.

3. The CookieStore changes are umbrellaed under the entire partitioned cookies feature, there is no separate flag/control for the CookieStore.

4. Same answer as 3, CookieStore changes are part of the larger partitioned cookies feature.

All sounds good. I'll add them to this PR, and to mdn/browser-compat-data#18591.

[chrisdavidmills]

@DCtheTall CookieStore additions added; let me know what you think. The preview URLs have been updated.

[DCtheTall]

LGTM, thanks!

[chrisdavidmills]

@sideshowbarker this is another one that's had an extensive review, but basically just needs merging. Can you have a quick look?

[chrisdavidmills]

Yay, cheers @sideshowbarker