JS retrieve multiple with FetchXML

var fetchXml = "<fetch mapping='logical'><entity name='account'><attribute name='accountid'/><attribute name='name'/></entity></fetch>";
fetchXml = "?fetchXml=" + encodeURIComponent(fetchXml);

Xrm.WebApi.retrieveMultipleRecords("account", fetchXml).then(
    function success(result) {
        for (var i = 0; i < result.entities.length; i++) {
            console.log(result.entities[i]);
        }                    

        // perform additional operations on retrieved records
    },
    function (error) {
        console.log(error.message);
        // handle error conditions
    }
);