perf(dom-to-react): destructure react object to optimize parser

Author: remarkablemark

lib/dom-to-react.js

@@ -2,6 +2,10 @@ var React = require('react');
 var attributesToProps = require('./attributes-to-props');
 var utilities = require('./utilities');
 
+var cloneElement = React.cloneElement;
+var createElement = React.createElement;
+var isValidElement = React.isValidElement;
+
 /**
  * Converts DOM nodes to React elements.
  *
@@ -14,27 +18,27 @@ function domToReact(nodes, options) {
   options = options || {};
   var result = [];
   var node;
-  var isReplacePresent = typeof options.replace === 'function';
-  var replacement;
+  var hasReplace = typeof options.replace === 'function';
+  var replaceElement;
   var props;
   var children;
 
   for (var i = 0, len = nodes.length; i < len; i++) {
     node = nodes[i];
 
-    // replace with custom React element (if applicable)
-    if (isReplacePresent) {
-      replacement = options.replace(node);
+    // replace with custom React element (if present)
+    if (hasReplace) {
+      replaceElement = options.replace(node);
 
-      if (React.isValidElement(replacement)) {
+      if (isValidElement(replaceElement)) {
         // specify a "key" prop if element has siblings
         // https://fb.me/react-warning-keys
         if (len > 1) {
-          replacement = React.cloneElement(replacement, {
-            key: replacement.key || i
+          replaceElement = cloneElement(replaceElement, {
+            key: replaceElement.key || i
           });
         }
-        result.push(replacement);
+        result.push(replaceElement);
         continue;
       }
     }
@@ -84,7 +88,7 @@ function domToReact(nodes, options) {
       props.key = i;
     }
 
-    result.push(React.createElement(node.name, props, children));
+    result.push(createElement(node.name, props, children));
   }
 
   return result.length === 1 ? result[0] : result;