JSPP

JSPP is a preprocessor for JavaScript.

How to use

1. require 'JSPP':

var jspp = require('JSPP');

1. create a preprocessor object:

var pp = jspp.create({falses: ['_debug'], donts: ['_assert'], minify: true});

1. preprocess your JavaScript code:

sys.puts(pp.preprocess(jscode));  

Options

You can use the following options when creating a preprocessor object:

• trues: variable_name_list
  Variables in variable_name_list are replaced with 'true'.
  if the code becomes redundant because of this replacement, JSPP optimize it.
  For example, if { trues: ['x.a'] } is given,

if (x.a || x.b) {
    y = x;
} else {
    y = null;
}

is optimized like:

y = x;

• falses: variable_name_list
  Variables in variable_name_list are replaced with 'false'.
  if the code becomes redundant because of this replacement, JSPP optimize it.
  For example, if { falses: ['_debug'] } is given,

if (_debug) {
    ......
}

is removed.

• donts: func_name_list
  Function calls are removed if the functions are listed in func_name_list.
  For exmaple, if { donts: ['_assert'] } is given,

_assert(...);

is removed.

• minify: boolean
  JSPP provides code minification by using UglifyJS.

• calc: boolean
  if { calc: true } is given, JSPP automatically calculates operations between immediate values.