Showdownjs replacement for literalMidWordAsterisks

literalMidWordAsterisks.showdownjs.extension.js

showdown.extension('literalMidWordAsterisks', function () {
  return [{
    type: 'listener',
    listeners: {
      'italicsAndBold.before': function (event, text, options, globals) {
      	if (options.literalMidWordAsterisks) {
          text = text.replace(/\b\*{1,}\b/g, function (wm) {
            return wm.split('').map(function () { return '¨A';}).join('');
          })
        }
        return text;
      },
      'italicsAndBold.after': function (event, text, options, globals) {
      	return text.replace('¨A', '*');
      },
    }
  }];
});

// to run the extension
var conv = new showdown.Converter({
  extensions: ['literalMidWordAsterisks'],
  literalMidWordAsterisks: true
});