Preserve the navigation API key for same-document replacements

[shannonbooth]

Fixes: #12932

(this is similar to what is done on step 9 of https://html.spec.whatwg.org/#finalize-a-cross-document-navigation)

• At least two implementers are interested (and none opposed):
  • Chromium: Already implements
  • Webkit: Already implements
  • Gecko: Already implements
• Tests are written and can be reviewed and commented upon at:
  • https://github.com/web-platform-tests/wpt/blob/master/navigation-api/navigation-history-entry/current-basic.html
• Implementation bugs are filed:
  • Chromium: N/A
  • Gecko: N/A
  • WebKit: N/A
  • Deno (only for timers, structured clone, base64 utils, channel messaging, module resolution, web workers, and web storage): N/A
  • Node.js (only for timers, structured clone, base64 utils, channel messaging, and module resolution): N/A
• Corresponding HTML AAM & ARIA in HTML issues & PRs: N/A
• MDN issue is filed: N/A
• The top of this comment includes a clear commit message to use.

(See WHATWG Working Mode: Changes for more details.)

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/browsing-the-web.html ( diff )