SOURCE

function New(){
    let obj = {}
    let arr = Object.values(arguments)
    let constructor = arr.shift()
    let result = constructor.apply(obj,arr)
    return typeof result === "object"?result:obj;
}
function F(name,age) {
    this.name = name
    this.age = age
    this.getName = function() {
        console.log(name)//这里不对的
        console.log(this.name)//这里对的
    }
}
let obj = New(F,"xiaoming",18)
console.log(obj)
obj.name = "dawang"
obj.getName()