custom jquery event

getRoom.js

  window.startDate = false;
  window.endDate = false;

  let dateOutSel = 'input[name="dateOut"]';
  let dateInSel = 'input[name="dateIn"]';  

  $('label[for=dateOut]').hide('fast');
  $(dateOutSel).hide('fast');

  $(dateInSel).datepicker().on('changeDate', function(e) {
    window.startDate = moment(e.date);
    $('label[for=dateOut]').show('fast');
    $('input[name="dateOut"]').show('fast');
  });

  $(dateOutSel).datepicker().on('changeDate', function(e) {
    window.endDate = moment(e.date);
    $( document ).trigger( "getRoom", [ window.startDate, window.endDate ] );
  });

    $( document ).trigger( "getRoom", [ window.startDate, window.endDate ] );

  $( document ).on( "getRoom", {
    meta: window
  }, function( event, startDate, endDate ) {
 
    console.log( event.data.meta ); // "window vars"
    console.log( startDate );           // "bim"
    console.log( endDate );           // "baz"
  });