#htmlparser2
A forgiving HTML/XML/RSS parser written in JS for NodeJS. The parser can handle streams (chunked data) and supports custom handlers for writing custom DOMs/output.
##Installing npm install htmlparser2
##Usage
var htmlparser = require("htmlparser2");
var parser = new htmlparser.Parser({
onopentag: function(name, attribs){
if(name === "script" && attribs["language"] === "javascript"){
console.log("JS! Hooray!");
}
},
ontext: function(text){
console.log("-->", text);
},
onclosetag: function(tagname){
if(tagname === "script"){
console.log("That's it?!");
}
}
});
parser.write("Xyz <script language= javascript>var foo = '<<bar>>';< / script>");
parser.done();Output (simplified):
--> Xyz
JS! Hooray!
--> var foo = '<<bar>>';
That's it?!Read more about the parser in the wiki.
##Get a DOM
The DomHandler (known as DefaultHandler in the original htmlparser module) produces a DOM (document object model) that can be manipulated using the DomUtils helper.
The DomHandler, while still bundled with this module, was recently moved to it's own module. Have a look at it for further information.
##Parsing RSS/RDF/Atom Feeds
new htmlparser.FeedHandler(function(<error> error, <object> feed){
...
});##Performance
Using a slightly modified version of node-expats bench.js, I received the following results (on a MacBook (late 2010)):
- htmlparser: 51779 el/s
- sax.js: 53169 el/s
- node-expat: 103388 el/s
- htmlparser2: 118614 el/s
The test may be found in tests/bench.js.
##How is this different from node-htmlparser? This is a fork of the project above. The main difference is that this is intended to be used only with node (it runs on other platforms using browserify). Besides, the code is much better structured, has less duplications and is remarkably faster than the original.
The parser now provides a callback interface close to sax.js (originally targeted at readabilitySAX). I also fixed a couple of bugs & included some pull requests for the original project (eg. RDF feed support).
The support for location data and verbose output was removed a couple of versions ago. It's still available in the verbose branch.
The DefaultHandler and the RssHandler were renamed to clarify their purpose (to DomHandler and FeedHandler). The old names are still available when requiring htmlparser2, so your code should work as expected.