Highlighter function has no callback method

[jbrooksuk]

I'm using the example for pygmetize-bundled where you pass a callback through to highlight:

highlight: function (code, lang, callback) {
  pygmentize({ lang: lang, format: 'html' }, code, function (err, result) {
    callback(err, result.toString());
  });
}

But I get this error:

callback(err, result.toString());                            │···················
                        ^                                                            │···················
TypeError: undefined is not a function                                               │···················
    at /var/www/bloot/lib/routes.js:22:4                                             │···················
    at ChildProcess.exitClose (/var/www/bloot/node_modules/pygmentize-bundled/index.j│···················
s:24:13)                                                                             │···················
    at ChildProcess.EventEmitter.emit (events.js:98:17)                              │···················
    at maybeClose (child_process.js:735:16)                                          │···················
    at Socket.<anonymous> (child_process.js:948:11)                                  │···················
    at Socket.EventEmitter.emit (events.js:95:17)                                    │···················
    at Pipe.close (net.js:451:12)   

[ChrisWren]

Are you using the async version of marked? Look at the example in usage where the second argument to the marked function is a callback.

[smagch]

As @ChrisWren said, you should pass arguments with 3 arity in order to do asynchronous stuff. Take a look at an API here
https://github.com/chjj/marked#markedmarkdownstring-options-callback

var marked = require('marked');
var str = require('fs').readFileSync('./foo.js').toString();
var options = {
  gfm: true,
  highlight: function (code, lang, callback) {
    pygmentize({ lang: lang, format: 'html' }, code, function (err, result) {
      if (err) return callback(err);
      callback(null, result.toString());
    });
  }
};

var html;
// It'll throw error
// html = marked(str);
marked(str, options, function(err, result) {
  html = result;
});

I'm writing this because I've just got the same error and looked around docs and issues.

[supersheep]

options here should be optional, I've made try to fix this, take a look :) #260