responseType=document only supports XML not HTML

[kaikiai]

I discovered a problem with responseType='document' in FakeXHR.
When using responseType in browser it is usable with XML and with HTML.

FakeXHR only works with XML

function convertResponseBody(responseType, contentType, body) {
....
} else if (responseType === "document") {
    if (isXmlContentType(contentType)) {
        return FakeXMLHttpRequest.parseXML(body);
    }
    return null;
}

should also be usable with content-type='text/html' and then not parsing with XML but instead use a parser with text/html as mime-type

[fatso83]

Just file a PR to handle this. This seems fine.

[stale]

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