dojo语句执行顺序

?

dojo.declare("Test", null, {myData : null,myFunc : function() {alert(this.myData);console.log("4");},constructor : function() {console.log("1");var self = this;dojo.xhrGet({url : "data.json",sync:true,load : function(data) {self.myData = data;console.log("2");}});console.log("3");}});var t = new Test();t.myFunc();

?