diff --git a/package.json b/package.json
index 3c17ff0..7acd85f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bytedo/fetch",
-  "version": "1.0.2",
+  "version": "1.1.0",
   "description": "全新的ajax封装。分2个版本, 一个基于XMLHttpRequest, 一个基于window.fetch",
   "main": "dist/index.js",
   "directories": {
diff --git a/src/index.es7 b/src/index.es7
index 58d823a..82a10fa 100644
--- a/src/index.es7
+++ b/src/index.es7
@@ -6,10 +6,6 @@
 
 import { Format, toS } from './lib/format.js'
 
-const noop = function(e, res) {
-  this.defer.resolve(res)
-}
-
 const NOBODY_METHODS = ['GET', 'HEAD']
 const FORM_TYPES = {
   form: 'application/x-www-form-urlencoded; charset=UTF-8',
@@ -286,12 +282,8 @@ class _Request {
   }
 
   __success__(isSucc, result) {
-    var response = new _Response(
-      result.status,
-      result.statusText,
-      result.body,
-      result.headers
-    )
+    var { body, status, statusText, headers } = result
+    var response = new Response(body, { status, statusText, headers })
 
     if (isSucc) {
       this.defer.resolve(response)
@@ -304,7 +296,10 @@ class _Request {
   }
 
   __cancel__(result) {
-    var response = new _Response(0, ERRORS[10100], Object.create(null))
+    var response = new Response('', {
+      status: 0,
+      statusText: ERRORS[10100]
+    })
 
     this.defer.reject(response)
 
@@ -314,7 +309,10 @@ class _Request {
   }
 
   __timeout__(result) {
-    var response = new _Response(504, ERRORS[10504], Object.create(null))
+    var response = new Response('', {
+      status: 504,
+      statusText: ERRORS[10504]
+    })
 
     this.defer.reject(response)
 
@@ -324,40 +322,6 @@ class _Request {
   }
 }
 
-class _Response {
-  constructor(status = 200, statusText = 'OK', data = null, headers = {}) {
-    this.status = status
-    this.statusText = statusText
-    this.ok = status >= 200 && status < 400
-    this.headers = headers
-
-    Object.defineProperty(this, '__R__', {
-      value: data,
-      writable: true,
-      enumerable: false,
-      configurable: true
-    })
-  }
-
-  text() {
-    return this.__R__.text()
-  }
-
-  json() {
-    return this.__R__.text().then(t => {
-      return JSON.parse(t)
-    })
-  }
-
-  blob() {
-    return this.__R__
-  }
-
-  arrayBuffer() {
-    return this.__R__.arrayBuffer()
-  }
-}
-
 const _fetch = function(url, options) {
   return new _Request(url, options, {
     BASE_URL: _fetch.BASE_URL,
diff --git a/src/next.es7 b/src/next.es7
index bc1c860..5d0b217 100644
--- a/src/next.es7
+++ b/src/next.es7
@@ -6,21 +6,29 @@
 
 import { Format, toS } from './lib/format.js'
 
-const noop = function(e, res) {
-  this.defer.resolve(res)
-}
-
+const NATIVE_FETCH = window.fetch
 const NOBODY_METHODS = ['GET', 'HEAD']
 const FORM_TYPES = {
   form: 'application/x-www-form-urlencoded; charset=UTF-8',
   json: 'application/json; charset=UTF-8',
   text: 'text/plain; charset=UTF-8'
 }
+const ERRORS = {
+  10001: 'Argument url is required',
+  10012: 'Parse error',
+  10100: 'Request canceled',
+  10104: 'Request pending...',
+  10200: 'Ok',
+  10204: 'No content',
+  10304: 'Not modified',
+  10500: 'Internal Server Error',
+  10504: 'Connected timeout'
+}
 
 class _Request {
   constructor(url = '', options = {}, { BASE_URL, __INIT__ }) {
     if (!url) {
-      throw new Error('Argument url is required')
+      throw new Error(ERRORS[10001])
     }
 
     // url规范化
@@ -176,8 +184,7 @@ class _Request {
         delete options[k]
       }
     }
-    return window
-      .fetch(url, options)
+    return NATIVE_FETCH(url, options)
       .then(r => {
         clearTimeout(this.timer)
         var isSucc = r.status >= 200 && r.status < 400