Access global Buffer conditionally (#15)

Author: denis-sokolov

index.js

@@ -1,5 +1,6 @@
 'use strict'
 
+const hasBuffer = typeof Buffer !== 'undefined'
 const suspectProtoRx = /"(?:_|\\u005[Ff])(?:_|\\u005[Ff])(?:p|\\u0070)(?:r|\\u0072)(?:o|\\u006[Ff])(?:t|\\u0074)(?:o|\\u006[Ff])(?:_|\\u005[Ff])(?:_|\\u005[Ff])"\s*:/
 const suspectConstructorRx = /"(?:c|\\u0063)(?:o|\\u006[Ff])(?:n|\\u006[Ee])(?:s|\\u0073)(?:t|\\u0074)(?:r|\\u0072)(?:u|\\u0075)(?:c|\\u0063)(?:t|\\u0074)(?:o|\\u006[Ff])(?:r|\\u0072)"\s*:/
 
@@ -17,7 +18,7 @@ function parse (text, reviver, options) {
   const protoAction = options.protoAction || 'error'
   const constructorAction = options.constructorAction || 'error'
 
-  if (Buffer.isBuffer(text)) {
+  if (hasBuffer && Buffer.isBuffer(text)) {
     text = text.toString()
   }