/**
     Submits a history search using the main input field's current
     text. It is assumed that Chat.e.viewSearch===Chat.e.currentView.
  */
  Chat.submitSearch = function(){
    const term = this.inputValue(true);
    const eMsgTgt = D.clearElement(
      this.e.viewSearch.querySelector('.message-widget-content')
    );
    if( !term ) return;
    D.append(eMsgTgt, "TODO: search term = ", term);
    F.fetch(
      "chat-query", {
        urlParams: {q: term},
        responseType: 'json',
        onload:function(jx){
          let prevId = 0;
          console.log("jx =",jx);
          D.clearElement(eMsgTgt);
          jx.msgs.forEach((m)=>{
            const mw = new Chat.MessageWidget(m);
            D.append( eMsgTgt, mw.e.body );
            prevId = m.msgid;
          });
          if( jx.msgs.length ){
            // TODO: MessageSpacer
          }else{
            D.append( D.clearElement(eMsgTgt),
                      'No results matching the search term: ',
                      term );
          }
        }
      }
    );
  };

  const afterFetch = function f(){
    if(true===f.isFirstCall){
      f.isFirstCall = false;
      Chat.ajaxEnd();
      Chat.e.viewMessages.classList.remove('loading');