TypeScript装饰器，获取值的类型

import 'reflect-metadata';

function LogType(target: any, propertyKey: string, descriptor: PropertyDescriptor) {
    const originalMethod = descriptor.value;

    descriptor.value = function (...args: any[]) {
        args.forEach((arg, index) => {
            const type = Reflect.getMetadata('design:paramtypes', target, propertyKey)[index];
            console.log(`Argument ${index} is of type: ${type.name}`);
        });
        return originalMethod.apply(this, args);
    };

    return descriptor;
}

class Example {
    @LogType
    greet(name: string, age: number) {
        console.log(`Hello, ${name}! You are ${age} years old.`);
    }
}

const example = new Example();
example.greet('Alice', 30);

{
  "compilerOptions": {
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  }
}