Missing info of copying sessionStorage on creating new context

szalonna commented 2 years ago

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

In the HTML Living standard - webstorage under sessionStorage getter there is a note mentioning that there is a case when the content of the sessionStorage is copied to a new context. I think this edge case is not mentioned in the page, or not highlighted enough. The only content which mentions this behavior is the following sentence:

Opening a page in a new tab or window creates a new session with the value of the top-level browsing context, which differs from how session cookies work.

I think this is ambiguous and does not highlight nor the copy of the content of the sessionStorage, nether the disconnect between the two sessionStorage and the "top-level browsing context" may not highlight the source of the copied sessionStorage as this is not a day-to-day expression devs may use.

What did you expect to see?

I would love to see a subsection dedicated to this behavior with the following content:

in what cases the content of sessionStorage copied (e.g. open a new page with window.open, iframes, etc)
mentions the disconnect between the contents of the two sessionStorage, so if the subpage changes the copied content, it does not applies to the source page's content
list the way of how to prevent the copy of sessionStorage (e.g. use noopener flag)

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

I love MDN, I love the content, I love what you did and do there. Keep up the good work!

MDN metadata

Page report details

* Folder: `en-us/web/api/window/sessionstorage` * MDN URL: https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage * GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/api/window/sessionstorage/index.md * Last commit: https://github.com/mdn/content/commit/cc1f5c3bd1a9976a0668eeee016f6afc144533b0 * Document last modified: 2022-06-03T04:32:25.000Z

muntiMedia commented 2 years ago

To open a new window try window.open('http://example.com/redirect/path);

szalonna commented 2 years ago

@Techi-Dev how is this relevant to this issue?

mdn / content