Externalise size

Author: wooorm

index.js

@@ -3,6 +3,7 @@
 var array = require('x-is-array');
 var object = require('is-object');
 var proto = require('getprototypeof');
+var size = require('unist-util-size');
 
 var objectProto = Object.prototype;
 
@@ -287,19 +288,6 @@ function syntheticKey(node) {
   return node.type + ':' + JSON.stringify(props);
 }
 
-function size(node) {
-  var children = node && node.children;
-  var length = (children && children.length) || 0;
-  var index = -1;
-  var count = 0;
-
-  while (++index < length) {
-    count = count + 1 + size(children[index]);
-  }
-
-  return count;
-}
-
 function parent(value) {
   return node(value) && 'children' in value;
 }

package.json

@@ -20,6 +20,7 @@
   "dependencies": {
     "getprototypeof": "^1.0.0",
     "is-object": "^1.0.1",
+    "unist-util-size": "^1.0.0",
     "x-is-array": "^0.1.0"
   },
   "files": [