uglifyjs compress js

gistfile1.txt

var UglifyJS = require('C:/d1/a/node_modules/uglify-js/tools/node.js');
var fs = require('fs');
var i,o ;
i = process.argv[2];
o = process.argv[3];

var result = UglifyJS.minify(i, {
  mangle: true,
  compress: {
    sequences: true,
    dead_code: true,
    conditionals: true,
    booleans: true,
    unused: true,
    if_return: true,
    join_vars: true,
    drop_console: true
  }
});

fs.writeFileSync(o, result.code);