1. function nameDecorator(target: any, key: string): any {
    2.   const descriptor: PropertyDescriptor = {
    3.     writable: false
    4.   };
    5.   return descriptor;
    6. }
    8. test.name = 'dell lee';
    10. // 修改的并不是实例上的 name， 而是原型上的 name
    11. function nameDecorator(target: any, key: string): any {
    12.   target[key] = 'lee';
    13. }
    15. // name 放在实例上
    16. class Test {
    17.   @nameDecorator
    18.   name = 'Dell';
    19. }
    21. const test = new Test();
    22. console.log((test as any).__proto__.name);