关键组件
xml
xml处理
DOMParser
XMLSerializer
XPath
XPathEvaluator
XPathResult
XSLT
XSLTProcessor
xml处理
1、将字符串转为DOM是通过DOMParser
Document parseFromString(string, 'text/html')
2、将DOM转为字符串是通过XMLSerializer
string serializeToString(dom)
XPath
Document实现了XPathEvaluator接口，XPathEvaluator方法有
javascript
XPathExpression createExpression(expression, nsresolver);
XPathNSResolver createNSResolver(node);
XPathResult evaluate(expression, context, nsresolver, type, result);