Tablesorter滚动不起作用

Question

我有一张桌子，需要启用可滚动选项。我尝试了下面的代码但是我根本没有看到可滚动选项。

$("#ticket-table").tablesorter({
             sortList: [],
             headers: {
                 // 2: {
                 //     //sorter: 'time',
                 //     //sorter:'my_date_column' 
                 //     //dateFormat: "ddd mmm yyyy hh:mm:ss"
                 //     //sorter: 'monthDayYear'
                 // },
                 10: {
                     sorter: false
                 },
                 16: {
                     sorter: false
                 }
             },
             theme: "bootstrap",
             headerTemplate: '{content} {icon}',
             widgets: ['uitheme','scroller'],
             widgetOptions: {
                  scroller_height : 20,
      // scroll tbody to top after sorting
      scroller_upAfterSort: true,
      // pop table header into view while scrolling up the page
      scroller_jumpToHeader: true,
      // In tablesorter v2.19.0 the scroll bar width is auto-detected
      // add a value here to override the auto-detected setting
      scroller_barWidth : null
      // scroll_idPrefix was removed in v2.18.0
      // scroller_idPrefix : 's_'
            }
         });