SOURCE

function Parent() {
    this.hobby = [
        'running'
    ]
}
Parent.prototype.showHobby = function () {
    console.log(this.hobby)
}

function Child(name) {
    this.name = name
    Parent.call(this)
}
Child.prototype = new Parent()
Child.prototype.showName = function () {
    console.log(this.name)
}
Child.prototype.constructor = Child;

function myNew(fn, ...args) {
    // let obj = {}
    // fn.call(obj, ...args)
    // obj.__proto__ = fn.prototype
    // return obj
    let obj = Object.create(fn.prototype)
    let ret = fn.apply(obj, args)
    return ret instanceof Object ? ret : obj
}




let c = new Child('zhang san')
let d = myNew(Child, 'zhang san')
console.log(c.__proto__)
console.log(d.__proto__)
c.showHobby()
d.showHobby()
c.showName()
d.showName()

手写js组合继承 + new操作符

body{
    color: white
}