From 8dd538c3cbc0e73e46a0af52f8836fdfb73f5836 Mon Sep 17 00:00:00 2001
From: Christoph Werner <christoph@codepunkt.de>
Date: Thu, 9 Feb 2017 00:04:04 +0100
Subject: [PATCH] Re-introduce toString formatter

---
 src/util.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/util.js b/src/util.js
index c21b918..4f790e2 100644
--- a/src/util.js
+++ b/src/util.js
@@ -68,10 +68,11 @@ export const omitEmptyValues = (obj) => {
 }
 
 // format keyframe styles to string
-export const toString = (keyframes) => {
+const defaultFormatter = (key, value) => `${key}:${value};`
+export const toString = (keyframes, formatter = defaultFormatter) => {
   return Object.keys(keyframes).reduce((outer, perc) => {
     const value = Object.keys(keyframes[perc]).reduce((inner, prop) => {
-      return `${inner}${prop}:${keyframes[perc][prop]};`
+      return `${inner}${formatter(prop, keyframes[perc][prop])}`
     }, '')
     return `${outer}${perc}{${value}}`
   }, '')