class Parent{
public n:number=2;
constructor(){}
public test(){
console.log("object123")
}
}
class Son extends Parent{
public son!:number;
constructor(){
super();
}
public test(){
console.log(super.n)
}
}
let s = new Son();
s.test();
为什么子类方法里调用super.父类属性 得到的是undefined