Re: [heycam/webidl] Add and improve operations on BufferSources (#987)

@domenic commented on this pull request.



>  
-    To <dfn id="dfn-detach" for="ArrayBuffer" export>detach</dfn> an {{ArrayBuffer}}, these steps must be followed:
+    1.  Assert: if the type is not {{DataView}}, then |bytes|'s [=byte sequence/length=] [=modulo=]
+        the [=element size=] of that type is 0.
+    1.  Let |arrayBuffer| be the result of [=ArrayBuffer/creating=] an {{ArrayBuffer}} from |bytes|
+        in |realm|.
+    1.  Let |constructor| be the appropriate constructor from |realm|.\[[Intrinsics]] for the type
+        of {{ArrayBufferView}} being created.
+    1.  Return [=!=] [$TypedArrayCreate$](|constructor|, « |arrayBuffer| »).

I guess we can just use Construct(); TypedArrayCreate doesn't buy us much.

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