modulexml

xml processing module, you can use the xml module to parse and process xml and html files

To parse the xml file you can use code like this:

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var xml = require('xml');
var fs = require('fs');

var xmlStr = fs.readFile('test.xml');
var xmlDoc = xml.parse(xmlStr);

console.log(xmlDoc.documentElement.nodeName); // output root node name

In the above code we usefsThe module's readFile method reads an xml file, then uses the xml module's parse method to parse the xml file and returns anXmlDocumentObject xmlDoc. Then, we can access the root element of the xml document through xmlDoc.documentElement.

To parse html files, you just need to modify your code slightly:

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var xml = require('xml');
var fs = require('fs');

var htmlStr = fs.readFile('test.html');
var xmlDoc = xml.parse(htmlStr, 'text/html');

console.log(xmlDoc.documentElement.nodeName); // output root node name

Here we also usefsThe readFile method of the module reads an html file, but when we call the parse method of the xml module, we specify the second parameter as 'text/html', so that the xml module will parse the file according to the grammatical rules of html.

The parsed Xml document objects areXmlDocumentTypes, their properties and methods can all be manipulated with reference to the XML Object Model (DOM).

object

Document

xml document object, seeXmlDocumentobject

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XmlDocument xml.Document;

static function

parse

Parse xml/html text and createXmlDocumentObject, multilingual is not supported

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static XmlDocument xml.parse(String source,
    String type = "text/xml");

Call parameters:

• source: String, specifies the xml/html text that needs to be parsed
• type: String, specifies the text type, the default is text/xml, it can also be specified as text/html

Return results:

• XmlDocument, returns the createdXmlDocumentobject

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Parse xml/html and createXmlDocumentObject, which will be converted according to the specified language during parsing

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static XmlDocument xml.parse(Buffer source,
    String type = "text/xml");

Call parameters:

• source:Buffer, specify the xml/html binary data that needs to be parsed
• type: String, specifies the text type, the default is text/xml, it can also be specified as text/html

Return results:

• XmlDocument, returns the createdXmlDocumentobject

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serialize

SerializationXmlNodeis a string

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static String xml.serialize(XmlNode node);

Call parameters:

• node:XmlNode, specify what needs to be serializedXmlNode

Return results:

• String, returns the serialized string

constant

ELEMENT_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlElementobject

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const xml.ELEMENT_NODE = 1;

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ATTRIBUTE_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlAttrobject

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const xml.ATTRIBUTE_NODE = 2;

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TEXT_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlTextobject

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const xml.TEXT_NODE = 3;

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CDATA_SECTION_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlCDATASectionobject

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const xml.CDATA_SECTION_NODE = 4;

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PROCESSING_INSTRUCTION_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlProcessingInstructionobject

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const xml.PROCESSING_INSTRUCTION_NODE = 7;

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COMMENT_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlCommentobject

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const xml.COMMENT_NODE = 8;

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DOCUMENT_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlDocumentobject

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const xml.DOCUMENT_NODE = 9;

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DOCUMENT_TYPE_NODE

XmlNodeThe nodeType attribute constant indicates that the node isXmlDocumentTypeobject

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const xml.DOCUMENT_TYPE_NODE = 10;