jquery on

jquery binding的問題
當有些html是隨著操作動態產生的時候

如果直接用
('.class').click的話 後續產生的會沒有作用
Event handlers are bound only to the currently selected elements; they must exist on the page at the time your code makes the call to .on().
要用

$( "#dataTable tbody tr" ).on( "click", function() {
  alert( $( this ).text() );
});

$( "#dataTable tbody" ).on( "click", "tr", function() {
  alert( $( this ).text() );
});