Why the toString and Object. The prototype. ToString. Call is not the same

We can use the Object. The prototype. ToString. Call whether data for pure JSON or array Such as:

var arr=[aa,bb,cc];
arr.toString() / / output "aa, bb, cc"
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but

Object.prototype.toString.call(arr)// Output "[object Array]"
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The toString () and the Object. The prototype. ToString. Call () is not the same. All data types are inherited in the js Object, Array also inherited the Object, but the Array will override inherited from the Object’s toString method, so the Object. The prototype. The toString toString and Array is different of the two methods.