Relationship between globals, Realms, and global environment records

[Anne van Kesteren]

I thought these to be 1:1:1, but e.g. HTML defines the document.open()
API https://html.spec.whatwg.org/multipage/webappapis.html#dom-document-open
which replaces the global object. It's not currently defined in
excruciating detail, but I suspect it will be at some point since
content depends on this working.

Should that affect the Realm and global environment record?


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