js中常見繼承方式

function father()

father.prototype.getvalue = function()
function son()
//繼承father
son.prototype = new father();//原型重寫，contructor被改寫
son.prototype.construtor = son;//重新指向son
son.prototype.getsonvalue = function()
var instance = new son();
console.log(instance.getvalue());

function father()

function son()
son.prototype = new father;
var instance1 = new son();
instance1.colors.push("black");
console.log(instance1.colors);
instance2 = new son();
instance2.colors.push("pink");
console.log(instance2.colors);

function father(name)

father.prototype.sayname = function()
function son(name,age)
son.prototype = new father();//使用原型鏈繼承超型別方法
son.prototype.constructor = son;//重新指向son
son.prototype.sayage = function()
var instance1 = new son("lisi",12);
instance1.colors.push("brown");
console.log(instance1.colors);
instance1.sayname();
instance1.sayage();
var instance2 = new son("hah",22);
instance2.colors.push("black");
console.log(instance2.colors);
instance2.sayname();
instance2.sayage();

var person = ;

var anotherperson = object.create(person);
anotherperson.friends.push("yixiu");
console.log(person.friends);

function createanother(original)

return clone;
}var person = ;
//缺點：無法進行函式復用，只能使用父類中的方法
// person.prototype.say = function()
var anotherperson = createanother(person);
anotherperson.friends.push("yixiu");
console.log(person.friends);
anotherperson.sayhi();
// anotherperson.say();

function extend(subclass,superclass);

f.prototype = superclass.prototype;
=superclass.prtotype相當於原型共享而非繼承
subclass.prototype = new f();//繼承superclass的原型
subclass.prototype.constructor = subclass;//原型重寫，手動繫結
subclass.superclass = superclass.prototype;//將superclass.prototype快取起來，方便後續訪問
if(superclass.prototype.constructor == object.prototype.constructor)
}function father(name)
father.prototype.sayname = function()
function son(name,age)
extend(son,father);//
son.prototype.constructor = son;//重新指向son
son.prototype.sayage = function()
var instance1 = new son("lisi",12);
instance1.colors.push("brown");
console.log(instance1.colors);
instance1.sayname();
instance1.sayage();
var instance2 = new son("hah",22);
instance2.colors.push("black");
console.log(instance2.colors);
instance2.sayname();
instance2.sayage();

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