如果xml文件带有名字空间，XPATH支持
还不够完善。下面介绍两种可以工作的方式
namespace for XML documents http.get("https://wubigo.com/en/sitemap.xml", function(res) { useNamespaces const select = xpath.useNamespaces({"ns0": "http://www.sitemaps.org/schemas/sitemap/0.9"}); const nodes = select("//ns0:loc", doc); nodes.forEach((value) => console.log("ns0:"+value)); Implementing a Default Namespace Resolver const nsResolver = function nsResolver(prefix) { const ns = { 'ns0' : 'http://www.sitemaps.org/schemas/sitemap/0.9', 'mathml': 'http://www.w3.org/1998/Math/MathML' }; return ns[prefix] || null; }; nsResolver.lookupNamespaceURI = nsResolver; var result = xpath.evaluate( "//ns0:loc", // xpathExpression doc, // contextNode nsResolver, // namespaceResolver xpath.XPathResult.ANY_TYPE, // resultType null // result ) node = result.