This is a new flag for `<iframe sandbox="...">` which will allow a sandboxed document to spawn new windows without forcing the sandboxing flags upon them. This will allow, for example, a third-party advertisement to be safely sandboxed without forcing the same restrictions upon a landing page.
Status in Chromium
Enabled by default (tracking bug) in:
- Chrome for desktop release 46
- Chrome for Android release 46
- Android WebView release 46
Consensus & Standardization
Last updated on 2021-01-17