Fetch Replacement evalues to object, not function

[rwillemsandroid]

RN version: 0.35
RNFetchBlob version: 0.10.0
Platform: Android & iOS

I tried using the fetch replacement functions as documented here:
https://github.com/wkh237/react-native-fetch-blob/wiki/Fetch-API#fetch-replacement

import RNFetchBlob from 'react-native-fetch-blob';

const Fetch = RNFetchBlob.polyfill.Fetch;
// replace built-in fetch
window.fetch = new Fetch({
    // enable this option so that the response data conversion handled automatically
    auto : true,
    // when receiving response data, the module will match its Content-Type header
    // with strings in this array. If it contains any one of string in this array,
    // the response body will be considered as binary data and the data will stored
    // in file system instead of in memory.
    // By default, it only store response data to file system when Content-Type
    // contains string `application/octet`.
    binaryContentTypes : [
        'image/',
        'video/',
        'audio/',
    ]
});

However, when I do this and use fetch(), I get the following error:

fetch is not a function
TypeError: fetch is not a function

Logging the replacement fetch function yields the following:

console.log("RNfetchblob fetch: " , fetch);

The original fetch function looks like this:

Any help into solving this issue is greatly appreciated.

[wkh237]

@rwillemsandroid , thanks for reporting this issue. I think this is an mistake on document, please reference to the test case for proper usage.