js继承面试速记(内容抄自高程三)-白红宇

原型链

function SuperType(){    this.property = true;}SuperType.prototype.getSuperValue = function(){    return this.property;}function SubType(){    this.subproperty = false;}// 通过将原型指向另一个类型的事例来继承SubType.prototype = new SuperType();复制代码

借用构造函数

function SuperType(){    this.colors = ['red','blue','green'];}function SubType(){    // 继承了SuperType    SuperType.call(this)}复制代码

组合继承(伪经典继承)

function SuperType(name){    this.name = name;    this.colors = ['red','blue','green']}SuperType.prototype.sayName = function(){    alert(this.name)}function SubType(name,age){    // 继承属性    SuperType.call(this,name)    this.age = age;}// 继承方法SubType.prototype = new SuperType();SubType.prototype.constructor = SubType;复制代码

原型式继承

function object(o){    function F(){}    F.prototype = o;    return new F();}var person = {    name:"Nicholas",    friends:["Shelby","Court","Van"]};// 实现继承var anotherPerson = object(person);复制代码

寄生式继承

function createAnother(original){    var clone = object(original)  //原型式继承中的object方法    clone.sayHi = function(){        alert('hi')    };    return clone;}var person = {    name:'Nicholas',    friends：['Shelby','Court','Van']}// 实现继承var anotherPerson = createAnother(person)复制代码

寄生组合式继承

function inheriPrototype(subType,superType){    var prototype = object(supeType.prototype);   // 继承方法    prototype.constructor = subType;    subType.prototype = prototype;}function SuperType(name){    this.name = name;    this.colors = ['red','blue','green'];}superType.prototype.sayName = function(){    alert(this.name);}function SubType(name,obj){    // 继承属性    SuperType.call(this,name);    this.age = age;}// 继承方法inheritPrototype(SubType,SuperType)复制代码