javascript - Ext.EventManager is deprecated in ExtJS 5 -


in extjs 5 i'm getting console warning saying

[w] ext.eventmanager deprecated. use ext.dom.element#addlistener attach event listener.

i using code statement bellow,

ext.eventmanager.on(window, 'beforeunload', function() {     //code here });

i understand ext.eventmanager deprecated how should replace code statement work in extjs 5 ?

use getwin() method , append event handler using on.

ext.getwin().on('beforeunload',function(){     //code here });

other possible option use pure javascript.

window.onbeforeunload = function(){     //code here };

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