add a eventTrigger option

Want to separate button from textbox but not trigger "calendar div" when click textbox.

ex) button is to trigger calendar and allow user to type in textbox with inputmask.

$('#search_period').daterangepicker({
         timePicker: true,
         timePickerIncrement: 1,
         timePicker12Hour:false,
         format: 'YYYY.MM.DD HH:mm',
         eventTrigger: 'div.period-btn'
     }
 );

 $('#search_period').inputmask(
     {
         mask: "y.1.2 h:s:s - y.1.2 h:s:s",
         placeholder: "yyyy.MM.dd HH:mm - yyyy.MM.dd HH:mm",
         leapday: ".02.29",
         separator: '.',
         alias: "yyyy/mm/dd"
     }
 );