如何使用JavaScript获取具有特定属性值的XML节点的值?

我有一个XML文件(已精简):

<?xml version="1.0" encoding="UTF-8"?>
<Labels Version="24100002">
    <Attendant>Attendant</Attendant>
    <Attendant Index="1">Car Park Attendant</Attendant>
    <Attendant Index="2">Entrance Attendant</Attendant>
    <Attendant Index="3">Auditorium Attendant</Attendant>
    <Attendant Index="4">Attendant 4</Attendant>
</Labels>

而且,我有一个用于加载文件的JavaScript:

function loadXMLDoc(filename) {
    return fetch(filename)
        .then(response => {
            if (!response.ok) {
            throw new Error('Network response was not ok');
            }
            return response.text();
        })
        .then(str => (new window.DOMParser()).parseFromString(str, "text/xml"))
        .catch(error => {
            console.error('There has been a problem with your fetch operation:', error);
        });
}

在我的HTML文件中,我这样做(精简):

// Code snipped

// Fetch the XML and XSL files asynchronously
var [xsl, xml, labelsInfo] = await Promise.all([
    loadXMLDoc('DutyHistory-transform.xsl'),
    loadXMLDoc('DutyAssignHistory.xml'),
    loadXMLDoc('LabelsInfo.XML')
]);

// Code snipped

// We have to add 1 to the indexing because the LabelsInfo file has a "Attendant" label too!
xsltProcessor.setParameter(null, 'index13', labelsInfo.documentElement.getElementsByTagName('Attendant')[1].textContent.trim());
xsltProcessor.setParameter(null, 'index14', labelsInfo.documentElement.getElementsByTagName('Attendant')[2].textContent.trim());
xsltProcessor.setParameter(null, 'index15', labelsInfo.documentElement.getElementsByTagName('Attendant')[3].textContent.trim());

有什么办法可以直接得到所需的吗 Attendant @Index