Check ongoing navigation before proceeding with javascript: URL navigation

[byteforge38]

The "navigate to a javascript: URL" algorithm now receives the navigationId from the navigate algorithm and checks if the ongoing navigation is still the same before proceeding. This ensures that javascript: URL navigations do not interfere with other navigations that may have started in the meantime (e.g., form submissions).

Fixes #12075.

---

• At least two implementers are interested (and none opposed):
  • …
  • …
• Tests are written and can be reviewed and commented upon at:
  • https://github.com/web-platform-tests/wpt/blob/master/html/semantics/forms/form-submission-0/jsurl-navigation-then-form-submit.html (existing)
• Implementation bugs are filed:
  • Chromium: …
  • Gecko: …
  • WebKit: …
• MDN issue is filed: …
• The top of this comment includes a clear commit message to use.

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

---

/browsing-the-web.html ( diff )