1. // 普通方法，target 对应的是类的 prototype
    2. // 静态方法，target 对应的是类的构造函数
    4. function getNameDecorator(target: any, key: string, descriptor: PropertyDescriptor) {
    5.   // console.log(target, key);
    6.   // descriptor.writable = true;
    7.   descriptor.writable = false
    8.   descriptor.value = function() {
    9.     return 'decorator';
    10.   };
    11. }
    13. class Test {
    14.   name: string;
    15.   constructor(name: string) {
    16.     this.name = name;
    17.   }
    18.   @getNameDecorator
    19.   getName() {
    20.     return this.name;
    21.   }
    22. }
    24. const test = new Test('dell');
    25. console.log(test.getName());