javascript - 使用JavaScript对变量字符串进行XML解析(XML parsing of a variable string in JavaScript)

Question

I have a variable string that contains well-formed and valid XML.

(我有一个包含格式正确且有效的XML的可变字符串 。)

I need to use JavaScript code to parse this feed.

(我需要使用JavaScript代码来解析此供稿。)

How can I accomplish this using (browser-compatible) JavaScript code?

(如何使用（浏览器兼容）JavaScript代码完成此操作？)

  ask by David Bonnici translate from so

Answer 1

Updated answer for 2017

(更新了2017年的答案)

The following will parse an XML string into an XML document in all major browsers.

(下面将在所有主要浏览器中将XML字符串解析为XML文档。)

Unless you need support for IE <= 8 or some obscure browser, you could use the following function:

(除非需要支持IE <= 8或某些晦涩的浏览器，否则可以使用以下功能：)

function parseXml(xmlStr) {
   return new window.DOMParser().parseFromString(xmlStr, "text/xml");
}

If you need to support IE <= 8, the following will do the job:

(如果您需要支持IE <= 8，则可以执行以下操作：)

var parseXml;

if (typeof window.DOMParser != "undefined") {
    parseXml = function(xmlStr) {
        return new window.DOMParser().parseFromString(xmlStr, "text/xml");
    };
} else if (typeof window.ActiveXObject != "undefined" &&
       new window.ActiveXObject("Microsoft.XMLDOM")) {
    parseXml = function(xmlStr) {
        var xmlDoc = new window.ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async = "false";
        xmlDoc.loadXML(xmlStr);
        return xmlDoc;
    };
} else {
    throw new Error("No XML parser found");
}

Once you have a Document obtained via parseXml , you can use the usual DOM traversal methods/properties such as childNodes and getElementsByTagName() to get the nodes you want.

(通过parseXml获得Document parseXml ，就可以使用常规的DOM遍历方法/属性，例如childNodes和getElementsByTagName()来获取所需的节点。)

Example usage:

(用法示例：)

var xml = parseXml("<foo>Stuff</foo>");
alert(xml.documentElement.nodeName);

If you're using jQuery, from version 1.5 you can use its built-in parseXML() method, which is functionally identical to the function above.

(如果您使用的是jQuery，则从1.5版开始，您可以使用其内置的parseXML()方法，该方法在功能上与上述功能相同。)

var xml = $.parseXML("<foo>Stuff</foo>");
alert(xml.documentElement.nodeName);