Typescript防止基类被实例化

class BaseClass{
    constructor() {
        console.log(new.target,new.target == BaseClass);
        //防止基类被实例化
        if (new.target === BaseClass){
            throw new Error('基类只能被继承,不能被实例化');
        }
    }
}
class SubClass extends BaseClass{
    constructor() {
        super();
    }
}

//let bc = new BaseClass();//基类禁止实例化,会报错
let sc = new SubClass();