fixup! Use the new algorithm to create DOMExceptions.

Author: Ms2ger

index.bs

@@ -12366,14 +12366,21 @@ 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|, perform the following steps:
+  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)?
+        1.  Let |newTargetPrototype| be [=?=] [$Get$](|newTarget|, "prototype").
+        1.  If [$Type$](|newTargetPrototype|) is Object, then set |prototype| to
+            |newTargetPrototype|.
     1.  Let |instance| be a newly created [=ECMAScript/object=] in |realm|.
+    1.  Set |instance|.\[[Prototype]] to |prototype|.
     1.  Set |instance|'s essential internal methods to the definitions specified in
         [=ECMA-262 Ordinary object internal methods and internal slots=].
-    1.  Set |instance|.\[[Prototype]] to the [=interface prototype object=] for |interface| in
-        |realm|.
     1.  Let |interfaces| be the [=inclusive inherited interfaces=] of |interface|.
     1.  [=list/iterate|For every=] [=interface=] |ancestor interface| in |interfaces|:
         1.  [=Define the unforgeable regular operations=] of |ancestor interface| on |instance|,
@@ -12402,12 +12409,14 @@ object is associated with.
     1.  Return |instance|.
 </div>
 
+<div class="note">
+    Specifications may refer to the "[=create an object implementing the
+    interface=]" algorithm in various ways, including "a new |interface| object".
+</div>
+
 The <dfn id="dfn-primary-interface" export>primary interface</dfn> of a platform object
 that implements one or more interfaces is the most-derived [=interface=]
-that it implements.  The value of the \[[Prototype]] [=internal slot=]
-of the platform object is the [=interface prototype object=]
-of the [=primary interface=]
-from the [=platform object=]’s associated global environment.
+that it implements.
 
 The global environment that a given [=platform object=]
 is associated with can <dfn id="dfn-change-global-environment" for="global environment" export>change</dfn> after it has been created.  When
@@ -13360,7 +13369,7 @@ Each {{DOMException}} object has an associated <dfn for="DOMException">name</dfn
 The <dfn constructor for="DOMException"><code>DOMException(|message|, |name|)</code></dfn>
 constructor, when invoked, must run these steps:
 
-1. Let |e| be a [=new=] {{DOMException}} object in {{NewTarget}}'s Realm.
+1. Let |e| be a [=new=] {{DOMException}} object in {{NewTarget}}'s Realm, with {{NewTarget}}.
 1. Set |e|'s [=DOMException/name=] to |name|.
 1. Set |e|'s [=DOMException/message=] to |message|.
 1. Return |e|.