In SharePoint JSOM, how get a column in the list by name?

The following code will get the list of all the fields in the SharePoint List, however what I m interest in is if a particular field exists or not.

  function retrieveFieldsOfListView(listTitle,viewName){

     var context = new SP.ClientContext.get_current();
     var web = context.get_web();
     var list = web.get_lists().getByTitle(listTitle);
     var listFields = list.get_fields();
     context.load(listFields);
     context.executeQueryAsync(printFieldNames,onError);

     function printFieldNames() {
     var e = listFields.getEnumerator();
        //debugger; 
        while (e.moveNext()) {
           var field = e.get_current();
           console.log(field.get_title());
        }
     }

     function onError(sender,args)
     {
        console.log(args.get_message());
     }
  }

Please note, I don't have a list view with this field in it.