Move creator a separate file.

This matches matcher, selector and selectorAll.

Author: mbostock

src/creator.js

@@ -0,0 +1,24 @@
+import namespace from "./namespace";
+
+function creatorInherit(name) {
+  return function() {
+    var document = this.ownerDocument,
+        uri = this.namespaceURI;
+    return uri && uri !== document.documentElement.namespaceURI
+        ? document.createElementNS(uri, name)
+        : document.createElement(name);
+  };
+}
+
+function creatorFixed(fullname) {
+  return function() {
+    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+  };
+}
+
+export default function(name) {
+  var fullname = namespace(name);
+  return (fullname.local
+      ? creatorFixed
+      : creatorInherit)(fullname);
+}

src/selection/append.js

@@ -1,29 +1,6 @@
-import namespace from "../namespace";
+import creator from "../creator";
 import selector from "../selector";
 
-function creatorInherit(name) {
-  return function() {
-    var document = this.ownerDocument,
-        uri = this.namespaceURI;
-    return uri && uri !== document.documentElement.namespaceURI
-        ? document.createElementNS(uri, name)
-        : document.createElement(name);
-  };
-}
-
-function creatorFixed(fullname) {
-  return function() {
-    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
-  };
-}
-
-function creator(name) {
-  var fullname = namespace(name);
-  return (fullname.local
-      ? creatorFixed
-      : creatorInherit)(fullname);
-}
-
 function append(create) {
   return function() {
     return this.appendChild(create.apply(this, arguments));

test/selection/index-test.js

@@ -3,10 +3,9 @@ var tape = require("tape"),
     d3 = require("../../");
 
 tape("d3.selection() returns a selection of the document element", function(test) {
+  var document = global.document = jsdom.jsdom();
   try {
-    var document = global.document = jsdom.jsdom(),
-        s = d3.selection();
-    test.equal(s.node(), document.documentElement);
+    test.equal(d3.selection().node(), document.documentElement);
     test.end();
   } finally {
     delete global.document;