export default {}; /* function testDecorator(constructor: any) { constructor.prototype.uname = "张予曦"; constructor.prototype.show = ():void => { console.log(`我是${constructor.prototype.uname}`); } } @testDecorator class Person { } let p = new Person(); (p as any).show(); */ // 工厂函数 /* function testDecorator(flag: boolean) { if(flag) { return function (constructor: any) { constructor.prototype.uname = "张予曦"; constructor.prototype.show = (): void => { console.log(`我是${constructor.prototype.uname}`); }; }; }else { return function(constructor: any) {} } } @testDecorator(true) class Person {} let p = new Person(); // (p as any).show(); */ // T 就相当于一个类 // 函数可以接收很多的参数,参数的类型都是any类型,最后把这些都放在了数组中 /* function testDecorator<T extends new(...args: any[]) => {}>(constructor: T) { // 直接对 constructor 进行扩展 return class extends constructor { name = "章若楠"; age = 18; show() { console.log(this.name, "xxxxxxxxxxxxxxxxxxxx"); } } } @testDecorator class Person { name: string; constructor(name: string) { this.name = name } } let p = new Person("陈意涵"); console.log(p); (p as any).show() */ // 工厂函数 function testDecorator() { return function <T extends new (...args: any[]) => {}>(constructor: T) { return class extends constructor { name = "章若楠"; age = 18; show() { console.log(this.name, "xxxxxxxxxxxxxxxxxxxx"); } }; }; } const Person = testDecorator()(class { name: string; constructor(name: string) { this.name = name } }) // class Person { // name: string; // constructor(name: string) { // this.name = name; // } // } let p = new Person("陈意涵"); console.log(p.name); p.show()