这篇文章主要介绍js中有哪三种继承方式，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
1.js原型（prototype）实现继承
代码如下
<body>
<script type="text/javascript">
function Parent(name,age){
this.name=name;
this.age=age;
this.sayHi=function(){
alert("Hi, my name is "+this.name+", my age is "+this.age);
}
}
//Child继承Parent
function Child(grade){
this.grade=grade;
this.sayGrade=function(){
alert("My grade is "+this.grade);
}
}
Child.prototype=new Parent("小明","10");///////////
var chi=new Child("5");
chi.sayHi();
chi.sayGrade();
</script>
</body>2.构造函数实现继承
代码如下:
<body>
<script type="text/javascript">
function Parent(name,age){
this.name=name;
this.age=age;
this.sayHi=function(){
alert("Hi, my name is "+this.name+", my age is "+this.age);
}
}
//Child继承Parent
function Child(name,age,grade){
this.grade=grade;
this.sayHi=Parent;///////////
this.sayHi(name,age);
this.sayGrade=function(){
alert("My grade is "+this.grade);
}
}
var chi=new Child("小明","10","5");
chi.sayHi();
chi.sayGrade();
</script>
</body>3.call , apply实现继承 -----很方便！
代码如下:
<body>
<script type="text/javascript">
function Parent(name,age){
this.name=name;
this.age=age;
this.sayHi=function(){
alert("Hi, my name is "+this.name+", my age is "+this.age);
}
}
function Child(name,age,grade){
this.grade=grade;
// Parent.call(this,name,age);///////////
// Parent.apply(this,[name,age]);/////////// 都可
Parent.apply(this,arguments);///////////
this.sayGrade=function(){
alert("My grade is "+this.grade);
}
// this.sayHi=function(){
// alert("Hi, my name is "+this.name+", my age is "+this.age+",My grade is "+this.grade);
// }
}
var chi=new Child("小明","10","5");
chi.sayHi();
chi.sayGrade();
</script>
</body>以上是“js中有哪三种继承方式”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注亿速云行业资讯频道！
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