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1. Basic definition and generated examples
{ // 基本定义和生成实例 class Parent{
constructor(name='mukewang'){//构造器，初始化一些参数 this.name=name;
}
}
let v_parent=new Parent('v');
console.log('构造函数和实例',v_parent);
}2. Inheritance (via extends Direct subclasses inherit parent classes)
{ // 继承 class Parent{
constructor(name='mukewang'){ this.name=name;
}
}
class Child extends Parent{
}
console.log('继承',new Child());
}Inheritance passes its own parameters (note: you can use super() to use your own attributes, and super must be placed First line)
{ // 继承传递参数 class Parent{
constructor(name='mukewang'){ this.name=name;
}
}
class Child extends Parent{
constructor(name='child'){
super(name); this.type='child';
}
}
console.log('继承传递参数',new Child('hello'));
}Getters and setters in the class
{ // getter,setter class Parent{
constructor(name='mukewang'){ this.name=name;
}
//注意下面的longName是属性而不是方法
get longName(){ return 'mk'+this.name
}
set longName(value){ this.name=value;
}
}
let v=new Parent();
console.log('getter',v.longName);
v.longName='hello';
console.log('setter',v.longName);
}Static methods and static properties
{ // 静态方法 使用static声明 注意：静态方法只能通过类来调用，而不能通过类的实例进行调用，相当于es5中的私有方法 class Parent{
constructor(name='mukewang'){ this.name=name;
}
static tell(){
console.log('tell');
}
}
Parent.tell();
}
{ // 静态属性 直接类名通过.来声明一个静态属性 class Parent{
constructor(name='mukewang'){ this.name=name;
}
static tell(){
console.log('tell');
}
}
Parent.type='test';
console.log('静态属性',Parent.type);
}
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