function newFn(fn,...args) {
let obj = Object.create(fn.prototype),
//将obj的隐式原型指向fn的prototype
result = fn.call(obj,...args)
//为obj拷贝自身属性
if(result instanceof Object) {
//result 在Object的原型链上,说明返回了对象或是数组
return result
}else {
return obj
}
}
//测试
function Person(name,age,sex) {
this.name = name
this.age = age
this.sex = sex
}
newFn(Person,'Ej',18,'feMale')
网友评论