jq源码判断数据类型

4.Object.prototype.toString.call()

 1 var a = Object.prototype.toString;
 2
 3 console.log(a.call("aaa"));
 4 console.log(a.call(1));
 5 console.log(a.call(true));
 6 console.log(a.call(null));
 7 console.log(a.call(undefined));
 8 console.log(a.call([]));
 9 console.log(a.call(function() {}));
10 console.log(a.call({}));