摘要：上述每次都需要寫可以優(yōu)化但是此處改變了的屬性，故我們需要顯示的指出構(gòu)造函數(shù)和原型組合模式二創(chuàng)建空對(duì)象前兩種方式創(chuàng)建的對(duì)象含有原型，最后一種方式創(chuàng)建的對(duì)象無原型，是真正意義上的空對(duì)象參考資料

var ob = new Object()
ob.name = "name"
ob.say = function() {}

var ob = {
name: "name",
say: function() {}
}

批量創(chuàng)建對(duì)象的方式

function createOb (name){
    var ob = new Object()
    ob.name = name
    ob.say = function() {}
    return ob
}
var ob1 = createOb("zhang")
var ob2 = createOb("san")

構(gòu)造函數(shù)需要大寫

function Parent(name) {
    this.name = name
    this.say = function() {}
}
var child1 = new Parent("child1")
var child2 = new Parent("child2")

當(dāng)我們創(chuàng)建一個(gè)函數(shù)時(shí)，該函數(shù)就會(huì)具備一個(gè)prototype屬性，這個(gè)屬性指向通過構(gòu)造函數(shù)創(chuàng)建的那個(gè)函數(shù)的原型對(duì)象。通俗點(diǎn)講原型對(duì)象就是內(nèi)存中為其他對(duì)象提供共享屬性和方法的對(duì)象。

function Parent2(name) {
    Parent2.prototype.name = name
    Parent2.prototype.say = function() {}
}

上述每次都需要寫Parent2.prototype,可以優(yōu)化

function Parent3() {}
Parent3.prototype = {
    name: "name"
    say: function(){}
}
var ob = new Parent3

但是此處改變了Parent3的constructor 屬性，故我們需要顯示的指出constructor  

function Parent4() {}
Parent4.prototype = {  
    constructor: Parent4,
    name: "name",
    say: function() {}
}
var ob = new Parent4()

function Parent5(name) {
    this.name = name
}
Parent5.prototype = {
    constructor: Parent5,
    say: function() {}
}
var ob = new Parent5("zhang")

var ob1 = {}
var ob2 = new Object()
var ob3 = Object.create(null)

前兩種方式創(chuàng)建的對(duì)象含有原型，最后一種方式創(chuàng)建的對(duì)象無原型，是真正意義上的空對(duì)象  

https://segmentfault.com/a/11...