js获取xml中所有节点

let xmlString = `
<library>
  <book id="1">
    <title>JavaScript: The Good Parts</title>
    <author>Douglas Crockford</author>
  </book>
  <book id="2">
    <title>Eloquent JavaScript</title>
    <author>Marijn Haverbeke</author>
  </book>
</library>
`;

let parser = new DOMParser();
let xmlDoc = parser.parseFromString(xmlString, "text/xml");

let nodes = xmlDoc.getElementsByTagName("*"); // 获取所有节点
for (let i = 0; i < nodes.length; i++) {
  console.log(nodes[i].nodeName); // 打印节点名称
}

let xmlString = `
<library>
  <book id="1">
    <title>JavaScript: The Good Parts</title>
    <author>Douglas Crockford</author>
  </book>
  <book id="2">
    <title>Eloquent JavaScript</title>
    <author>Marijn Haverbeke</author>
  **  </book>
</library>
`;

let parser = new DOMParser();
let xmlDoc = parser.parseFromString(xmlString, "text/xml");

let xpathResult = xmlDoc.evaluate("//*", xmlDoc, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
for (let i = 0; i < xpathResult.snapshotLength; i++) {
  console.log(xpathResult.snapshotItem(i).nodeName); // 打印节点名称
}

function traverseNodes(node) {
  console.log(node.nodeName); // 打印当前节点名称
  let children = node.childNodes;
  for (let i = 0; i < children.length; i++) {
    traverseNodes(children[i]); // 递归遍历子节点
  }
}

let xmlString = `
<library>
  <book id="1">
    <title>JavaScript: The Good Parts</title>
    <author>Douglas Crockford</author>
  </book>
  <book id="2">
    <title>Eloquent JavaScript</title>
    <author>Marijn Haverbeke</author>
  </book>
</library>
`;

let parser = new DOMParser();
let xmlDoc = parser.parseFromString(xmlString, "text/xml");
traverseNodes(xmlDoc.documentElement); // 从根节点开始遍历

let errorNodes = xmlDoc.getElementsByTagName("parsererror");
if (errorNodes.length > 0) {
  console.error("XML parsing error:", errorNodes[0].textContent);
}