diff --git a/.prettierrc.yaml b/.prettierrc.yaml
new file mode 100644
index 0000000..c0e277f
--- /dev/null
+++ b/.prettierrc.yaml
@@ -0,0 +1,10 @@
+jsxBracketSameLine: true
+jsxSingleQuote: true
+semi: false
+singleQuote: true
+printWidth: 100
+useTabs: false
+tabWidth: 2
+trailingComma: none
+bracketSpacing: true
+arrowParens: avoid
\ No newline at end of file
diff --git a/Readme.md b/Readme.md
index a6503cb..dc8230f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -59,7 +59,7 @@ f1('/get_list', {body: {page: 1}})
 > 发起一个网络请求, options的参数如下。 同时支持配置公共域名, 公共参数。
 
   + method<String> 默认GET, 可选GET/POST/PUT/DELETE...
-  + body<Any> 要发送的数据, 如果是GET方式, 会被自动拼接到url上
+  + body<Any> 要发送的数据, 如果是不允许有`body`的方式, 会被自动拼接到url上
   + cache<String>  是否缓存, 
   + credentials<String/Boolean> 是否校验
   + signal<Object>  网络控制信号, 可用于中断请求
@@ -67,10 +67,32 @@ f1('/get_list', {body: {page: 1}})
 
 ```js
 fetch.BASE_URL = '//192.168.1.100'
-fetch.__INIT__ = {headers: {token: 123456}}
+fetch.__INIT__ = {headers: {token: 123456}} // 2.x 之后将废弃, 不推荐使用了
+// 1.2.0开始支持注入
+fetch.inject.request(function(conf) {
+  // 无需返回值, 但需要注意这是引用类型,不要对带个conf赋值
+  conf.headers.token = 123456
+})
 
+// 响应注入, 需要有返回值
+fetch.inject.response(function(res) {
+  return res.json()
+})
 ```
 
 
-2. fetch.create([base_url][, options<Object>])
+2. fetch.create([BASE_URL][, options<Object>])
 > 创建一个新的fetch实例
+
+```js
+var another = fetch.create('//192.168.1.101')
+// 新创建的实例, 也支持注入
+another.inject.request(function(conf) {
+  conf.headers.token = 123456
+})
+
+another.inject.response(function(res) {
+  return res.json()
+})
+
+```
\ No newline at end of file
diff --git a/package.json b/package.json
index 7dc73ea..c1302d4 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,11 @@
 {
   "name": "@bytedo/fetch",
-  "version": "1.1.3",
+  "version": "1.2.0",
   "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",
-  "files": ["dist/*"],
+  "files": [
+    "dist/*"
+  ],
   "scripts": {
     "start": "node ./build.js"
   },
@@ -11,7 +13,12 @@
     "type": "git",
     "url": "git+https://github.com/bytedo/fetch.git"
   },
-  "keywords": ["fetch", "axois", "request", "ajax"],
+  "keywords": [
+    "fetch",
+    "axios",
+    "request",
+    "ajax"
+  ],
   "author": "yutent",
   "license": "MIT",
   "bugs": {
diff --git a/src/index.js b/src/index.js
index e184565..01aee11 100644
--- a/src/index.js
+++ b/src/index.js
@@ -24,9 +24,9 @@ const ERRORS = {
   10504: 'Connected timeout'
 }
 
-Promise.defer = function() {
+Promise.defer = function () {
   var _ = {}
-  _.promise = new Promise(function(y, n) {
+  _.promise = new Promise(function (y, n) {
     _.resolve = y
     _.reject = n
   })
@@ -34,7 +34,7 @@ Promise.defer = function() {
 }
 
 class _Request {
-  constructor(url = '', options = {}, { BASE_URL, __INIT__ }) {
+  constructor(url = '', options = {}, { BASE_URL, __INIT__ }, owner) {
     if (!url) {
       throw new Error(ERRORS[10001])
     }
@@ -52,6 +52,7 @@ class _Request {
 
     this.xhr = new XMLHttpRequest()
     this.defer = Promise.defer()
+    this._owner = owner
 
     this.options = {
       headers: {
@@ -69,11 +70,11 @@ class _Request {
       var control = new AbortController()
       options.signal = control.signal
     }
-    this.defer.promise.abort = function() {
+    this.defer.promise.abort = function () {
       control.abort()
     }
 
-    var headers = this.options.headers
+    let headers = this.options.headers
 
     if (__INIT__.headers) {
       Object.assign(headers, __INIT__.headers)
@@ -86,6 +87,10 @@ class _Request {
 
     Object.assign(this.options, __INIT__, options, { url, headers })
 
+    if (owner._inject_req) {
+      owner._inject_req(this.options)
+    }
+
     this.__next__()
     return this.defer.promise
   }
@@ -155,8 +160,8 @@ class _Request {
       let $a = document.createElement('a')
       $a.href = options.url
 
-      crossDomain =
-        location.protocol !== $a.protocol || location.host !== $a.host
+      crossDomain = location.protocol !== $a.protocol || location.host !== $a.host
+      $a = null
     } catch (err) {}
 
     if (crossDomain) {
@@ -176,8 +181,7 @@ class _Request {
         options.url += (~options.url.indexOf('?') ? '&' : '?') + params
       }
       if (options.cache === 'no-store') {
-        options.url +=
-          (~options.url.indexOf('?') ? '&' : '?') + '_t_=' + Date.now()
+        options.url += (~options.url.indexOf('?') ? '&' : '?') + '_t_=' + Date.now()
       }
     } else {
       if (!hasAttach) {
@@ -197,16 +201,15 @@ class _Request {
     // 6.1
     this.xhr.onreadystatechange = ev => {
       if (options.timeout > 0) {
-        options['time' + this.xhr.readyState] = ev.timeStamp
+        this['time' + this.xhr.readyState] = ev.timeStamp
         if (this.xhr.readyState === 4) {
-          options.isTimeout = options.time4 - options.time1 > options.timeout
+          options.isTimeout = this.time4 - this.time1 > options.timeout
         }
       }
 
       if (this.xhr.readyState !== 4) {
         return
       }
-
       this.__dispatch__(options.isTimeout)
     }
 
@@ -285,6 +288,10 @@ class _Request {
     var { body, status, statusText, headers } = result
     var response = new Response(body, { status, statusText, headers })
 
+    if (this._owner._inject_res) {
+      response = this._owner._inject_res(response)
+    }
+
     if (isSucc) {
       this.defer.resolve(response)
     } else {
@@ -322,17 +329,37 @@ class _Request {
   }
 }
 
-const _fetch = function(url, options) {
-  return new _Request(url, options, {
-    BASE_URL: _fetch.BASE_URL,
-    __INIT__: _fetch.__INIT__ || Object.create(null)
-  })
+const _fetch = function (url, options) {
+  return new _Request(
+    url,
+    options,
+    {
+      BASE_URL: _fetch.BASE_URL,
+      __INIT__: _fetch.__INIT__ || Object.create(null)
+    },
+    _fetch
+  )
 }
 
-_fetch.create = function(BASE_URL, __INIT__ = Object.create(null)) {
-  return function(url, options) {
-    return new _Request(url, options, { BASE_URL, __INIT__ })
+function inject(target) {
+  target.inject = {
+    request(callback) {
+      target._inject_req = callback
+    },
+    response(callback) {
+      target._inject_res = callback
+    }
   }
 }
 
+_fetch.create = function (BASE_URL, __INIT__ = Object.create(null)) {
+  var another = function (url, options) {
+    return new _Request(url, options, { BASE_URL, __INIT__ }, another)
+  }
+  inject(another)
+  return another
+}
+
+inject(_fetch)
+
 export default _fetch
diff --git a/src/next.js b/src/next.js
index 5d0b217..291f842 100644
--- a/src/next.js
+++ b/src/next.js
@@ -6,7 +6,7 @@
 
 import { Format, toS } from './lib/format.js'
 
-const NATIVE_FETCH = window.fetch
+const nativeFetch = window.fetch
 const NOBODY_METHODS = ['GET', 'HEAD']
 const FORM_TYPES = {
   form: 'application/x-www-form-urlencoded; charset=UTF-8',
@@ -26,7 +26,7 @@ const ERRORS = {
 }
 
 class _Request {
-  constructor(url = '', options = {}, { BASE_URL, __INIT__ }) {
+  constructor(url = '', options = {}, { BASE_URL, __INIT__ }, owner) {
     if (!url) {
       throw new Error(ERRORS[10001])
     }
@@ -42,6 +42,8 @@ class _Request {
 
     options.method = (options.method || 'get').toUpperCase()
 
+    this._owner = owner
+
     this.options = {
       headers: {
         'X-Requested-With': 'XMLHttpRequest',
@@ -58,7 +60,7 @@ class _Request {
       options.signal = this.control.signal
     }
 
-    var headers = this.options.headers
+    let headers = this.options.headers
 
     if (__INIT__.headers) {
       Object.assign(headers, __INIT__.headers)
@@ -71,6 +73,10 @@ class _Request {
 
     Object.assign(this.options, __INIT__, options, { url, headers })
 
+    if (owner._inject_req) {
+      owner._inject_req(this.options)
+    }
+
     return this.__next__()
   }
 
@@ -133,8 +139,8 @@ class _Request {
       let $a = document.createElement('a')
       $a.href = options.url
 
-      crossDomain =
-        location.protocol !== $a.protocol || location.host !== $a.host
+      crossDomain = location.protocol !== $a.protocol || location.host !== $a.host
+      $a = null
     } catch (err) {}
 
     if (crossDomain && options.credentials === 'omit') {
@@ -149,10 +155,6 @@ class _Request {
       if (params) {
         options.url += (~options.url.indexOf('?') ? '&' : '?') + params
       }
-      if (options.cache === 'no-store') {
-        options.url +=
-          (~options.url.indexOf('?') ? '&' : '?') + '_t_=' + Date.now()
-      }
     } else {
       if (!hasAttach) {
         if (~options.headers['content-type'].indexOf('json')) {
@@ -176,18 +178,17 @@ class _Request {
     var url = options.url
     delete options.url
     for (let k in options) {
-      if (
-        options[k] === null ||
-        options[k] === undefined ||
-        options[k] === ''
-      ) {
+      if (options[k] === null || options[k] === undefined || options[k] === '') {
         delete options[k]
       }
     }
-    return NATIVE_FETCH(url, options)
+    return nativeFetch(url, options)
       .then(r => {
         clearTimeout(this.timer)
-        var isSucc = r.status >= 200 && r.status < 400
+        let isSucc = r.status >= 200 && r.status < 400
+        if (this._owner._inject_res) {
+          r = this._owner._inject_res(r)
+        }
         if (isSucc) {
           return r
         } else {
@@ -209,17 +210,36 @@ class _Request {
   }
 }
 
-const _fetch = function(url, options) {
-  return new _Request(url, options, {
-    BASE_URL: _fetch.BASE_URL,
-    __INIT__: _fetch.__INIT__ || Object.create(null)
-  })
+const _fetch = function (url, options) {
+  return new _Request(
+    url,
+    options,
+    {
+      BASE_URL: _fetch.BASE_URL,
+      __INIT__: _fetch.__INIT__ || Object.create(null)
+    },
+    _fetch
+  )
 }
-
-_fetch.create = function(BASE_URL, __INIT__ = Object.create(null)) {
-  return function(url, options) {
-    return new _Request(url, options, { BASE_URL, __INIT__ })
+function inject(target) {
+  target.inject = {
+    request(callback) {
+      target._inject_req = callback
+    },
+    response(callback) {
+      target._inject_res = callback
+    }
   }
 }
 
+_fetch.create = function (BASE_URL, __INIT__ = Object.create(null)) {
+  var another = function (url, options) {
+    return new _Request(url, options, { BASE_URL, __INIT__ }, another)
+  }
+  inject(another)
+  return another
+}
+
+inject(_fetch)
+
 export default _fetch