javascript - Monaca.getDeviceId() not able to set to variable -

i have tried multiple ways of setting device id variable once can used in other functions without requiring monaca callback. code not work:

function getdevid(){     monaca.getdeviceid(function(id){         return id;     }); } 

nor this:

var devid = monaca.getdeviceid(function(id){return id;}); 

so basically, how can set device id variable repeated use throughout app?

update: based on comment of possible duplicate asynch calls, went , analyzed , found correct. although not technically duplicate post, answer within post asynch workflow. solution issue can resolved way:

var devid = '';  document.addeventlistener ("deviceready", ondeviceready, false); function ondeviceready() {    monaca.getdeviceid(function(id){       devid = id;    });            }  

i able use devid anywhere needed post load.

using deviceready event listener, did, sure best approach, remember remove event listener when done. nevertheless, if using onsen ui, can use ons.ready(), waits dom initialized. fired couple of ms after deviceready, save code , have same result.