code: function append_history(data, metadata, element) {
      var div = document.createElement('div');
      element.append(div);
      var graph = new history.HistoryGraph('history-' + utils.makeid(), div, {
        width: data.width,
        height: data.height,
        hintMessage: ""
      });
      graph.load(data);
      return div;
    }
docs: /* History mime