saxen

/saxen/ parser

A tiny, super fast, namespace aware sax-style XML parser written in plain JavaScript.

Features

• (optional) entity decoding and attribute parsing
• (optional) namespace aware
• element / attribute normalization in namespaced mode
• tiny (4Kb minified + gzipped)

Usage

var Parser = require('saxen');

var parser = new Parser();

// enable namespace parsing: element prefixes will
// automatically adjusted to the ones configured here
// elements in other namespaces will still be processed
parser.ns({
  'http://foo': 'foo',
  'http://bar': 'bar'
});

parser.on('openTag', function(elementName, attrGetter, decodeEntity, selfClosing, getContext) {

  elementName;
  // with prefix, i.e. foo:blub

  var attrs = attrGetter();
  // { 'bar:aa': 'A', ... }
});

parser.parse('<blub xmlns="http://foo" xmlns:bar="http://bar" bar:aa="A" />');

Supported Hooks

We support the following parse hooks:

• openTag(elementName, attrGetter, decodeEntities, selfClosing, contextGetter)
• closeTag(elementName, selfClosing, contextGetter)
• error(err, contextGetter)
• warn(warning, contextGetter)
• text(value, decodeEntities)
• cdata(value)
• comment(value, decodeEntities)
• attention(str, decodeEntities)
• question(str)

In contrast to error, warn receives recoverable errors, such as malformed attributes.

Namespace Handling

In namespace mode, the parser will adjust tag and attribute namespace prefixes before passing the elements name to openTag or closeTag. To do that, you need to configure default prefixes for wellknown namespaces:

parser.ns({
  'http://foo': 'foo',
  'http://bar': 'bar'
});

To skip the adjustment and still process namespace information:

parser.ns();

Non-Features

/saxen/ lacks some features known in other XML parsers such as sax-js:

• no support for parsing loose documents, such as arbitrary HTML snippets
• no support for text trimming
• no automatic entity decoding
• no automatic attribute parsing

...and that is ok ❤.

Credits

We build on the awesome work done by easysax.

/saxen/ is named after Sachsen, a federal state of Germany. So geht sächsisch!

LICENSE

MIT