js中利用Object.prototype.toString.call()判断数据类型

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//Object.prototype.toString.call(xxx)--->"[object Xxxx]"

console.log(Object.prototype.toString.call(1));//"[object Number]"

console.log(Object.prototype.toString.call("abc"));//"[object String]"

console.log(Object.prototype.toString.call(true));//"[object Boolean]"

console.log(Object.prototype.toString.call(null));//"[object Null]"

console.log(Object.prototype.toString.call(undefined));//"[object Undefined]"

console.log(Object.prototype.toString.call([]));//"[object Array]"

console.log(Object.prototype.toString.call(function(){}));//"[object Function]"

console.log(Object.prototype.toString.call(/abc/));//"[object RegExp]"

console.log(Object.prototype.toString.call(new Date()));//"[object Date]"

console.log(Object.prototype.toString.call(Math));//"[object Math]"

console.log(Object.prototype.toString.call({}));//"[object Object]"

//无法确定自定义构造函数创建的对象的构造函数

function Person(){}

var p1=new Person();

console.log(Object.prototype.toString.call(p1));//"[object Object]"

</script>

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