Adjust type check approach for toJS performance fix

lukaswelinder · lukaswelinder · commit 0ca7f5dc2caa · 2018-08-24T19:57:19.000-07:00
diff --git a/src/toJS.js b/src/toJS.js
@@ -10,7 +10,7 @@ import { isIndexed } from './Predicates';
 import isDataStructure from './utils/isDataStructure';
 
 export function toJS(value) {
-  if (isDataStructure(value)) {
+  if (typeof value === 'object' && isDataStructure(value)) {
     value = Seq(value);
     const result = isIndexed(value) ? [] : {};
     value.forEach((v, k) => {
diff --git a/src/utils/isDataStructure.js b/src/utils/isDataStructure.js
@@ -13,8 +13,5 @@ import isPlainObj from './isPlainObj';
  * provided by Immutable.js or a plain Array or Object.
  */
 export default function isDataStructure(value) {
-  return (
-    typeof value === 'object' &&
-    (isImmutable(value) || Array.isArray(value) || isPlainObj(value))
-  );
+  return isImmutable(value) || Array.isArray(value) || isPlainObj(value);
 }
