javascript - Waiting for AJAX request response -


i have following function stores data in abc.printreport.reportdata. grab data ajax requests. want print data in new window open @ end of getkeydata function.

however, time window opens, ajax requests have not returned data, errors undefined properties. solution this?

getkeydata: function () {     (var key in abc.printreport.keylist) {         k = abc.printreport.keylist[key].report_key;         abc.printreport.reportdata[k] = null;         (function(index) {             ext.ajax.request({                 url: abc.core.servicepath + '/task/' + abc.printreport.processinstanceid + '/report/' + abc.printreport.keylist[key].report_key + '?portalid=' + abc.core.portalid,                 success: function (response) {                     abc.printreport.reportdata[index] = ext.json.decode(response.responsetext)[0];                 }             });         })(k);     }     window.open(location.pathname + 'resources/printreport.html'); },

even though there variable number of requests going on, can keep track of them , open window in success method when last request completes.

getkeydata: function () {     var total = abc.printreport.keylist.length;     var loaded = 0;     (var key in abc.printreport.keylist) {         k = abc.printreport.keylist[key].report_key;         abc.printreport.reportdata[k] = null;         (function(index) {             ext.ajax.request({                 url: abc.core.servicepath + '/task/' + abc.printreport.processinstanceid + '/report/' + abc.printreport.keylist[key].report_key + '?portalid=' + abc.core.portalid,                 success: function (response) {                     abc.printreport.reportdata[index] = ext.json.decode(response.responsetext)[0];                     loaded++;                     if (loaded == total) {                         window.open(location.pathname + 'resources/printreport.html');                     }                 }             });         })(k);     } },

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