[英]Get the full path of a node, after get it with an XPath query in JavaScript
我在JavaScript中有下一條指令:
var firstScene = document.evaluate('//Scene', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
所以我的問題是如何獲取節點firstscene
的完整路徑?
使用此getXPath()函數 :
function getXPath(node, path) {
path = path || [];
if(node.parentNode) {
path = getXPath(node.parentNode, path);
}
if(node.previousSibling) {
var count = 1;
var sibling = node.previousSibling
do {
if(sibling.nodeType == 1 && sibling.nodeName == node.nodeName) {count++;}
sibling = sibling.previousSibling;
} while(sibling);
if(count == 1) {count = null;}
} else if(node.nextSibling) {
var sibling = node.nextSibling;
do {
if(sibling.nodeType == 1 && sibling.nodeName == node.nodeName) {
var count = 1;
sibling = null;
} else {
var count = null;
sibling = sibling.previousSibling;
}
} while(sibling);
}
if(node.nodeType == 1) {
path.push(node.nodeName.toLowerCase() + (node.id ? "[@id='"+node.id+"']" : count > 0 ? "["+count+"]" : ''));
}
return path;
};
將從firstScene.iterateNext()
獲得的DOM對象傳遞給getXPath()
方法,它將返回一個包含所有XPATH步驟的數組。
然后,您可以使用數組join()
方法返回完整的XPATH表達式:
getXPath(firstScene.iterateNext()).join("/");
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