Reflect.metadata is not a function

[andrzejkupczyk]

Environment

node v16.20.0 (npm v8.19.4)

Reproduction

Run npm audit fix within the Nuxt 2 project and try to build the app.

Describe the bug

The reflect-metadata dependency is missing.

Additional context

I was able to solve this issue by adding the reflect-metadata dependency to my project and importing it. It seems that this is related to the v1.17.2 patch, specifically the addition of support to emit decorator metadata (#119). My suspicion is that reflect-metadata should not be included in the dev dependencies.

Logs

FATAL  Reflect.metadata is not a function

[pi0]

Hi dear @andrzejkupczyk. Is is possible for your to make a small reproduction repo?

[andrzejkupczyk]

Hey @pi0, thank you for the prompt reply. Alright, I'll work on preparing such a repository when I have some free time. Thanks!

[sirenkovladd]

package.json

{
  "name": "jiti-145",
  "author": "Sirenko Vlad",
  "devDependencies": {
    "jiti": "^1.19.1",
    "typescript": "^5.1.6"
  }
}

index.ts

function define(target: unknown, _: unknown) {
};

@define
export class Test {
  constructor() {
  }
}

❯ npx jiti index.ts
<cut>/jiti-145/node_modules/jiti/lib/index.js:2
  throw err; /* ↓ Check stack trace ↓ */
  ^

TypeError: Reflect.metadata is not a function
    at <cut>/jiti-145/index.ts:5:24
    at evalModule (<cut>/jiti-145/node_modules/jiti/dist/jiti.js:1:255106)
    at jiti (<cut>/jiti-145/node_modules/jiti/dist/jiti.js:1:253034)
    at Object.<anonymous> (<cut>/jiti-145/node_modules/jiti/bin/jiti.js:16:1)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32)
    at Module._load (node:internal/modules/cjs/loader:960:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47

Node.js v18.17.0

[andrzejkupczyk]

Thanks a bunch, @sirenkovladd! ❤️

[sirenkovladd]

@pi0 maybe it would be better to fork babel-plugin-transform-typescript-metadata and solve this problem?