class @Reflect.metadata('dd', 'aa' )Uncaught TypeError ，stage3

[alamhubb]

https://stackblitz.com/edit/node-dcnae4?file=index.ts

import 'reflect-metadata'

@Reflect.metadata('dd', 'aa')
export default class TestSerivce {
}


const t = new TestSerivce()

console.log(t)

The code is very simple. I am using stage3. Why is it wrong?

[alamhubb]

not support stage3

[alamhubb]

microsoft/TypeScript#55788