jabez128/chiffon

A very small ECMAScript parser, tokenizer and minify written in JavaScript.

Chiffon

A very small ECMAScript parser, tokenizer and minify written in JavaScript.

chiffon.min.js is 3KB now.

Installation

In Browser:

<script src="chiffon.js"></script>

or

<script src="chiffon.min.js"></script>

Object Chiffon will defined in the global scope.

In Node.js:

npm install chiffon

var Chiffon = require('chiffon');

bower:

bower install chiffon

Tokenize

Tokenize a string code.

• {Array} Chiffon.tokenize ( code [, options ] )
  @param {string} code Target code.
  @param {Object} [options] Tokenize options.
  @return {Array} Return an array of the parsed tokens.

var tokens = Chiffon.tokenize('var a = 1');
console.log(tokens);
/*
[ { type: 'Keyword',    value: 'var' },
  { type: 'Identifier', value: 'a' },
  { type: 'Punctuator', value: '=' },
  { type: 'Numeric',    value: '1' } ]
*/

JavaScript AST is not currently supported.

Chiffon work simply tokenizing.

Defined token type

• Comment
• LineTerminator
• Template
• String
• Punctuator
• RegularExpression
• Numeric
• UnicodeEscapeSequence
• Identifier
• Null
• Boolean
• Keyword

Options

• comment : {boolean} default=false
  true = Keep comment tokens.

• lineTerminator : {boolean} default=false
  true = Keep line terminator tokens.

Untokenize

Concatenate to string from the parsed tokens.

• {string} Chiffon.untokenize ( tokens )
  @param {Array} tokens An array of the parsed tokens.
  @return {string} Return a concatenated string.

Minify

Minify JavaScript code.

• {string} Chiffon.minify ( code )
  @param {string} code Target code.
  @return {string} Return a minified code.

var min = Chiffon.minify('var a = 1 + 1; // comment');
console.log(min); // var a=1+1;

Minify is a simple implementation as following.

function minify(code) {
  return untokenize(tokenize(code, { lineTerminator: true }));
}

Demo

• Demo

License

MIT