optimize resolveValue runtime

Author: peakchen90

runtime/resolve-value.js

@@ -1,7 +1,9 @@
 function resolveValue(args) {
-  return args[0] && args[0].target && typeof args[0].target === 'object'
-    ? args[0].target.value
-    : args[0];
+  var target = args[0] && args[0].target;
+  if(target && target.nodeType === 1) {
+    return target.value;
+  }
+  return args[0];
 }
 
 module.exports = resolveValue;