window.onload=function(){
            var arr="abc";
            console.log(arr);//abc
            var a=arr.split(" ");
            console.log(a);//["abc"]
            var b=arr.split("");//console.log(a);
            console.log(b);//["a", "b", "c"]
            console.log(typeof(a));//object
        }
 

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