js加载xml 文件出错

// 使用XMLHttpRequest加载XML文件
var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://example.com/data.xml', true);
xhr.onreadystatechange = function () {
    if (xhr.readyState === 4 && xhr.status === 200) {
        var xmlDoc = xhr.responseXML;
        if (xmlDoc) {
            console.log(xmlDoc);
        } else {
            console.error('Failed to parse XML');
        }
    }
};
xhr.onerror = function () {
    console.error('Network error');
};
xhr.send();

// 使用Fetch API加载XML文件
fetch('https://example.com/data.xml')
    .then(response => {
        if (!response.ok) {
            throw new Error('Network response was not ok ' + response.statusText);
        }
        return response.text();
    })
    .then(str => (new window.DOMParser()).parseFromString(str, "application/xml"))
    .then(data => {
        console.log(data);
    })
    .catch(error => console.error('Error:', error));