From 61acdd0c295e4447c9c10da04e287b1ebffe452c Mon Sep 17 00:00:00 2001
From: JD Isaacks <jd@jisaacks.com>
Date: Tue, 20 Jun 2017 17:55:44 -0400
Subject: [PATCH] default prefix to empty string (#3214)

This starting returning NaN for me. It looks like it is trying to add undefined + number when there is no prefix.
---
 uniqueId.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/uniqueId.js b/uniqueId.js
index 19a7eb1e6..16909062d 100644
--- a/uniqueId.js
+++ b/uniqueId.js
@@ -17,7 +17,7 @@ let idCounter = 0
  * uniqueId()
  * // => '105'
  */
-function uniqueId(prefix) {
+function uniqueId(prefix='') {
   const id = ++idCounter
   return `${prefix + id}`
 }