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				 # react-native-fetch-blob 
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				 [](https://github.com/wkh237/react-native-fetch-blob/releases) [](https://www.npmjs.com/package/react-native-fetch-blob)  [](https://github.com/wkh237/react-native-fetch-blob/wiki) []() 
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				- 
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				 A project committed to make file acess and data transfer easier, efficient for React Native developers. 
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				-# [Please visit our Github Page for latest document](https://github.com/wkh237/react-native-fetch-blob) 
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				- 
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				 ## Features 
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				 - Transfer data directly from/to storage without BASE64 bridging 
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				 - File API supports normal files, Asset files, and CameraRoll files 
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				@@ -403,6 +400,30 @@ In `version >= 0.4.2` it is possible to know the upload/download progress. After 
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				     }) 
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				 ``` 
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				+In `0.9.6`, you can specify an optional first argument which contains `count` and `interval` to limit progress event frequency (this will be done in native context in order to reduce RCT bridge overhead). Notice that `count` argument will not work if the server does not provide response content length. 
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				+```js 
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				+  RNFetchBlob.fetch('POST', 'http://www.example.com/upload', { 
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				+      ... some headers, 
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				+      'Content-Type' : 'octet-stream' 
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				+    }, base64DataString) 
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				+    // listen to upload progress event, emit every 250ms 
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				+    .uploadProgress({ interval : 250 },(written, total) => { 
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				+        console.log('uploaded', written / total) 
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				+    }) 
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				+    // listen to download progress event, every 10% 
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				+    .progress({ count : 10 }, (received, total) => { 
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				+        console.log('progress', received / total) 
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				+    }) 
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				+    .then((resp) => { 
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				+      // ... 
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				+    }) 
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				+    .catch((err) => { 
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				+      // ... 
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				+    }) 
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				+``` 
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				 ### Cancel Request 
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				 After `0.7.0` it is possible to cancel a HTTP request. When the request cancel, it will definately throws an promise rejection, be sure to catch it. 
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