Re: [heycam/webidl] Add an algorithm to create a platform object. (#635)

littledan commented on this pull request.



> @@ -12349,12 +12363,60 @@ It is the responsibility of specifications using Web IDL to state
 which global environment (or, by proxy, which global object) each platform
 object is associated with.
 
+<div algorithm>
+  To <dfn export lt="new|create|create a new|create an object implementing|create an object
+  implementing the interface">create an object implementing the interface</dfn> |interface| in the
+  Realm |realm|, with optional `new.target` value |newTarget|, perform the following steps:
+
+    1.  Assert: |interface| is [=exposed=] in |realm|.
+    1.  Let prototype be the [=interface prototype object=] for |interface| in
+        |realm|.
+    1.  If |newTarget| is provided, then:
+        1.  Issue: If we just pass {{NewTarget}} through in a constructor, would this not
+            always be defined (sometimes to the [=interface object=] itself)?

I'm not sure if it makes sense to take _newTarget_ as a parameter like this, as opposed to somehow retrieving it from the ambient algorithm. If we do that, then I imagine we'd have _newTarget_ provided if this algorithm is being invoked from a constructor, and we wouldn't have it provided if it's being invoked from some other algorithm.

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