ts修饰符 ---typescript

public : 

修饰的属性可以在任意位置访问/修改  一般默认为public;

private:

私有属性,私有属性只能在类自身的内部访问/修改

                在外部想访问或者修改私有属性,可以通过类内部添加方法实现

class Person{
    private _name : string;
    private _age : number;
    constructor(name:string,age:number){
        this._name = name;
        this._age = age;
    }
    get name(){
        return this._name
    }
    get age(){
        return this._age
    }
    set name(value:string){
        this._name = value
    }
    set age(value:number){
        if(value>=18){
            this._age = value
        }else{
            this._age = 5
        }
    }
}

const A = new Person("小王",10)
console.log(A);

A.name = "小张";
A.age = -100;
console.log(A);

protected:

收保护的属性,只能在当前类和当前类的子类中访问和修改;