code: function stripify(file) {
    if (/\.json$/.test(file)) return through();
  
    var code = '';
  
    function transform(chunk, encoding, next) {
      code += chunk;
      next();
    }
  
    function flush(done) {
      /* jshint validthis: true */
      var ast = rocambole.parse(code);
  
      code = rocambole.moonwalk(ast, function strip(node) {
        if (( // var debug = function() {};
            'VariableDeclaration' === node.type
          && 'debug' === node.declarations[0].id.name
        ) || ( // if (process.env.NODE_ENV !== 'production') { debug = ... }
            'IfStatement' === node.type
          && 'BinaryExpression' === node.test.type
          && 'production' === node.test.right.value
        ) || ( // debug( ... );
            'ExpressionStatement' === node.type
          && 'CallExpression' === node.expression.type
          && 'debug' === node.expression.callee.name
        )) {
          return remove(node);
        }
      });
  
      this.push(code.toString());
      done();
    }
  
    return through(transform, flush);
  }
docs: Browserify transform to remove all debug statements.
  
  @param {String} file File name
  @returns {Stream} Transform stream
  @api public