On Nov 24, 2014, at 7:11 AM, Anne van Kesteren wrote: > On Sat, Nov 22, 2014 at 10:42 PM, Boris Zbarsky <[email protected]> wrote: >> On 11/22/14, 6:20 AM, Anne van Kesteren wrote: >>> 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? >> >> Yes, imo. > > I filed https://www.w3.org/Bugs/Public/show_bug.cgi?id=27419 to track > this on the HTML side. >
There is definite a 1:1:1 relationship between a global object, realmRec, global environment record. And ES views those relationships are immutable. You can't just change the global object of a realmRec or give it a different global environment record after it has been initialized. Note that the ES6 spec. defines InitializeFirstRealm [1] that define how the first Realm gets created. Creating additional realms would have to perform a similar set of steps. Subsequent to the ES6 spec. we will be defining a ES level Realm object and associated API that supports creation and initialization of additional realms. Allen [1] http://people.mozilla.org/~jorendorff/es6-draft.html#sec-initializefirstrealm
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