node_modules/firebase-functions/lib/function-configuration.d.ts:4:64 - error TS1005: ']' expected

Question

I am getting the following error when executing the command firebase deploy --only function in my Ionic 3 project. This solution is not working for me.

Running command: npm --prefix "$RESOURCE_DIR" run build
> functions@ build /Users/myuser/Project/functions
> tsc

node_modules/firebase-functions/lib/function-configuration.d.ts:4:64 - error TS1005: ']' expected.
4 export declare const SUPPORTED_REGIONS: readonly ["us-central1", "us-east1", "us-east4", "europe-west1", "europe-west2", "asia-east2", "asia-northeast1"];
                                                                             ~

node_modules/firebase-functions/lib/function-configuration.d.ts:4:66 - error TS1134: Variable declaration expected.
4 export declare const SUPPORTED_REGIONS: readonly ["us-central1", "us-east1", "us-east4", "europe-west1", "europe-west2", "asia-east2", "asia-northeast1"];
                                                                   ~~~~~~~~~~

node_modules/firebase-functions/lib/function-configuration.d.ts:4:153 - error TS1005: ';' expected.
4 export declare const SUPPORTED_REGIONS: readonly ["us-central1", "us-east1", "us-east4", "europe-west1", "europe-west2", "asia-east2", "asia-northeast1"];
                                                                                                                                                          ~

node_modules/firebase-functions/lib/function-configuration.d.ts:16:61 - error TS1005: ']' expected.
16 export declare const VALID_MEMORY_OPTIONS: readonly ["128MB", "256MB", "512MB", "1GB", "2GB"];
                                                               ~

node_modules/firebase-functions/lib/function-configuration.d.ts:16:63 - error TS1134: Variable declaration expected.
16 export declare const VALID_MEMORY_OPTIONS: readonly ["128MB", "256MB", "512MB", "1GB", "2GB"];
                                                                 ~~~~~~~

node_modules/firebase-functions/lib/function-configuration.d.ts:16:93 - error TS1005: ';' expected.
16 export declare const VALID_MEMORY_OPTIONS: readonly ["128MB", "256MB", "512MB", "1GB", "2GB"];
                                                                                               ~

When I look into file node_modules/firebase-functions/lib/function-configuration.d.ts, it shows the syntax errors.

---

Version details:

"angularfire2": "^5.2.1",
"firebase": "^6.3.1",
"firebase-admin": "^8.2.0",
"firebase-functions": "3.2.0",
"typescript": "^3.5.3"

Answer 1

npm install -g [email protected] worked for me. I assume higher versions would work as well. It is important to update the global typescript version as my local typescript version update didn't work

Answer 2

Judging from the github issue that you linked and the error message itself, the error seems to be due to the new readonly tuples feature. It was introduced in [email protected] so, in theory, any typescript version higher than that should work.

In fact, [email protected] uses [email protected] so I recommend you use the same or higher.

---

That being said, I see that you have already used [email protected] but the error still popped up.

Version details:

"angularfire2": "^5.2.1",
"firebase": "^6.3.1",
"firebase-admin": "^8.2.0",
"firebase-functions": "3.2.0",
"typescript": "^3.5.3"

It may be because of a different (older) typescript version being used by some other package internally. Please check your package-lock.json (or yarn.lock) to confirm.

If that's not the case, then my next best guess is that ionic-app-scripts is using older typescript internally.

Answer 3

Check if any space got added into starting of this file. I had the same issue and after removing the space in the top of the file it was working.