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Copy path05.构造器.html
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05.构造器.html
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<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
// var o = {}
// var o1 = new Object()
// // console.log(o.constructor === o1.constructor)
// var a = 1
// var b = new Number(2)
// console.log(b) //Number {2}
// console.log(typeof b) //object
// console.log(typeof a) //number
// console.log(a instanceof Number) //false
// console.log(b instanceof Number) //true
// console.log(a.constructor === b.constructor)
// var arr = []
// var arr1 = new Array()
// console.log(arr1) // []
// console.log(typeof arr) //object
// console.log(typeof arr1) //object
// console.log(arr instanceof Array) //true
// console.log(arr1 instanceof Array) //true
//构造器函数
function Person () {
this.name = 'xx'
}
Person.prototype.headCount = 1
var p = new Person()
var p1 = new Person()
console.log(p === p1) //false
console.log(p.__proto__ === Person.prototype) //true
console.log(Person.constructor === Function) //true
// console.log()Person.__proto__ === Function.prototype //true
</script>
</body>
</html>