var historyJson = {}; function searchHistory(){ var dateFrom = $('#historyFrom').val(); var dateTo = $('#historyTo').val(); var eventRequest = { clientUUID : json[jsonIndex].clientUUID, localDateTimeFrom : dateFrom, localDateTimeTo : dateTo, mockedResponseId : json[jsonIndex].mockedResponseId }; $.ajax({ url: host + '/api/event', type: 'POST', data: JSON.stringify(eventRequest, null, 2), contentType: "application/json" }).done(function(data){ console.log(data); historyJson = data; }); } const startSearch = function(){ searchHistory(); } $('#btn-searchHistory').click(startSearch);