gistfile1.txt

new Shortcode(document.querySelector('body'), {
  button: function(done) {
    sc_sn(this, 'button', done);
  }
});

sc_sn = function(match, done) {
  $.ajax({
    success: function() {
      var replacementValue = '...';
      done(replacementValue);
    }
  })
}