1 files changed, 6 insertions, 3 deletions
diff --git a/node_modules/is-number/index.js b/node_modules/is-number/index.js
index 96ec66d5e..7a2a45bed 100644
--- a/node_modules/is-number/index.js
+++ b/node_modules/is-number/index.js
@@ -11,9 +11,12 @@ var typeOf = require('kind-of');
 
 module.exports = function isNumber(num) {
   var type = typeOf(num);
-  if (type !== 'number' && type !== 'string') {
+
+  if (type === 'string') {
+    if (!num.trim()) return false;
+  } else if (type !== 'number') {
     return false;
   }
-  var n = +num;
-  return (n - n + 1) >= 0 && num !== '';
+
+  return (num - num + 1) >= 0;
 };