text: const widgets = new Map([
      ["poll", poll_widget],
      ["tictactoe", tictactoe_widget],
      ["todo", todo_widget],
      ["zform", zform],
  ]);
  
  const widget_contents = new Map();
  exports.widget_contents = widget_contents;
  
  function set_widget_in_message(row, widget_elem) {
      const content_holder = row.find('.message_content');
      content_holder.empty().append(widget_elem);
  }
  
  exports.activate = function (in_opts) {
      const widget_type = in_opts.widget_type;
      const extra_data = in_opts.extra_data;
      const events = in_opts.events;
      const row = in_opts.row;
      const message = in_opts.message;
      const post_to_server = in_opts.post_to_server;
  
      events.shift();
  
      if (!widgets.has(widget_type)) {
          blueslip.warn('unknown widget_type', widget_type);
          return;
      }
  
      const callback = function (data) {
          post_to_server({
              msg_type: 'widget',
              data: data,
          });
      };
  
      if (row.attr('id').startsWith('zhome') && narrow_state.active()) {
          // Don't place widget in a home message row if we are narrowed
          // to active state
          return;
      }
  
      let widget_elem = widget_contents.get(message.id);
      if (widget_elem) {
          set_widget_in_message(row, widget_elem);
          return;
      }
  
      // We depend on our widgets to use templates to build
      // the HTML that will eventually go in this div.
      widget_elem = $('<div>').addClass('widget-content');
  
      widgets.get(widget_type).activate({
          elem: widget_elem,
          callback: callback,
          message: message,
          extra_data: extra_data,
      });
  
      widget_contents.set(message.id, widget_elem);
      set_widget_in_message(row, widget_elem);
  
      // Replay any events that already happened.  (This is common
      // when you narrow to a message after other users have already
      // interacted with it.)
      if (events.length > 0) {
          widget_elem.handle_events(events);
      }
  };
  
  exports.set_widgets_for_list = function () {
      for (const [idx, widget_elem] of widget_contents) {
          if (current_msg_list.get(idx) !== undefined) {
              const row = current_msg_list.get_row(idx);
              set_widget_in_message(row, widget_elem);
          }
      }
  };
  
  exports.handle_event = function (widget_event) {
      const widget_elem = widget_contents.get(widget_event.message_id);
  
      if (!widget_elem) {
          // It is common for submessage events to arrive on
          // messages that we don't yet have in view. We
          // just ignore them completely here.
          return;
      }
  
      const events = [widget_event];
  
      widget_elem.handle_events(events);
  };
  
  window.widgetize = exports;
  