JavaScript: Decompressing GZipped response. Works in C# not in JS

I'm getting gzipped data from a business api i'm working with, but I can't manage to decompress it into something readable in JS, though I managed with C#.

My question is - how do I unzip the received gzipped input to a string or json?

The following code works well for me in C#:

using (HttpWebResponse response = (HttpWebResponse)WebRequest.Create(url).GetResponse())
{
    using (GZipStream decompress = new GZipStream(response.GetResponseStream(), CompressionMode.Decompress))
    {
        using (StreamReader reader = new StreamReader(decompress))
        {
            responseFromServer = reader.ReadToEnd();
        }
    }
}

I've read various answers and tried some libraries but still can't manage to decompress it in JS (using same URL).

This is where the code should be in JS:

var requestData = {
    url: url,
    headers: {
        "Allow-Encoding": "gzip"
    }
}
request.get(requestData, function(error, response, body) {

    // compressed data is in body
});

I've tried pako, zlib but I am probably not using them correctly.

[edit] Some of my tries:

// Decode base64 (convert ascii to binary)
var strData = new Buffer(body).toString('base64');

// Convert binary string to character-number array
var charData = strData.split('').map(function (x) { return x.charCodeAt(0); });

// Turn number array into byte-array
var binData = new Uint8Array(charData);

// Pako magic
var data = pako.inflate(binData);

// Convert gunzipped byteArray back to ascii string:
var strData2 = String.fromCharCode.apply(null, new Uint8Array(data));

This code is running in a NodeJS application, and i'm using request package

Thanks