Simple JavaScript Lexer for XML documents
- Very small, fast and simple! (~250 sloc)
- Event driven API (SAX-like)
- Works in Browser, WebWorkers, ServiceWorkers, Node.js or React Native
- Fault tolerant
- Handles CDATA
- Easy to extend and fine tune (state machine is exposed in Lexer instances)
If you are looking for a XML Reader/Parser to convert XML documents into Javascript objects, check my other projects:
npm install --save xml-lexerconst lexer = require('xml-lexer').create();
const xml =
`<hello color="blue">
<greeting>Hello, world!</greeting>
</hello>`;
lexer.on('data', (data) => console.log(data));
lexer.write(xml);
/*
Console output:
{ type: 'open-tag', value: 'hello' }
{ type: 'attribute-name', value: 'color' }
{ type: 'attribute-value', value: 'blue' }
{ type: 'open-tag', value: 'greeting' }
{ type: 'data', value: 'Hello, world!' }
{ type: 'close-tag', value: 'greeting' }
{ type: 'close-tag', value: 'hello' }
*/const lexer = require('xml-lexer').create();
const chunk1 = `<hello><greet`; // note this
const chunk2 = `ing>Hello, world!</greeting></hello>`;
lexer.on('data', (data) => console.log(data));
lexer.write(chunk1);
lexer.write(chunk2);
/*
Console output:
{ type: 'open-tag', value: 'hello' }
{ type: 'open-tag', value: 'greeting' }
{ type: 'data', value: 'Hello, world!' }
{ type: 'close-tag', value: 'greeting' }
{ type: 'close-tag', value: 'hello' }
*/const lexer = require('xml-lexer').create();
lexer.on('data', (data) => console.log(data));
lexer.write(`<<hello">hi</hello attr="value">`);
/*
Console output (note the open-tag value):
{ type: 'open-tag', value: '<hello"' }
{ type: 'data', value: 'hi' }
{ type: 'close-tag', value: 'hello' }
*/const Lexer = require('xml-lexer');
const lexer = Lexer.create();
lexer.stateMachine[Lexer.State.tagBegin][Lexer.Action.lt] = () => {};
lexer.stateMachine[Lexer.State.tagName][Lexer.Action.error] = () => {};
lexer.on('data', (data) => console.log(data));
lexer.write(`<<hello">hi</hello attr="value">`);
/*
Console output (note the fixed open-tag value):
{ type: 'open-tag', value: 'hello' }
{ type: 'data', value: 'hi' }
{ type: 'close-tag', value: 'hello' }
*/MIT
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