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.
Specification being incubated in a Community Group
Status in Chromium
Enabled by default
Consensus & Standardization
Last updated on 2021-01-17