methods of objects be called without bind?

Is there a way to call inc of obj without bind?

 function callIt(callback){
   callback();
 }

 var obj = {
    count: 0,
    inc: function(){
       this.count++;
    }
 };

 callIt(obj.inc.bind(obj));
 obj.count;// 1

Question is relevant to me because of older IE-versions that do not support the method bind.

---

你可以使用一个函数值

callIt(function() { obj.inc(); });

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