Merge pull request #509 from lhlPersonal/master

fetch语义错误

.gitignore

@@ -1 +1,22 @@
-npm-debug.log
+git # OS X
+Icon?
+._*
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+
+# Linux
+.directory
+*~
+
+# npm
+node_modules
+dist
+*.gz
+
+# webstorm
+.idea/
+
+

docs/arraybuffer.md

@@ -894,8 +894,8 @@ Fetch API取回的数据，就是`ArrayBuffer`对象。
 
 ```javascript
 fetch(url)
-.then(function(request){
+.then(function(response){
-  return request.arrayBuffer()
+  return response.arrayBuffer()
 })
 .then(function(arrayBuffer){
   // ...