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TypeScript Firebase Cloud Functions don't recognize ES modules (can't `import` npm packages) #5180

Closed tdkehoe closed 1 year ago

tdkehoe commented 1 year ago

[REQUIRED] Environment info

firebase-admin@11.2.0 firebase-tools@11.15.0 firebase@9.12.1 node: 'v18.11.0' npm: '8.19.2'

firebase-tools:

macOS Big Sur 11.7

Platform:

[REQUIRED] Test case

This is the default package.json when you spin up Firebase Cloud Functions.

{
  "compilerOptions": {
    "module": "commonjs",
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "outDir": "lib",
    "sourceMap": true,
    "strict": true,
    "target": "es2017"
  },
  "compileOnSave": true,
  "include": [
    "src"
  ]
}

[REQUIRED] Steps to reproduce

npm install -g @angular/cli ng new CloudFunctions cd CloudFunctions npm install -g firebase-tools npm audit fix --force firebase init

Select Emulators. Select Create a new project. Select Functions Emulator and Firestore Emulator.

firebase login firebase init functions

Select TypeScript.

firebase emulators:start

Error: functions/lib/index.js does not exist, can't deploy Cloud Functions

In package.json change "main": "lib/index.js", to "main": "src/index.ts",.

Error: SyntaxError: Cannot use import statement outside a module

This is the error I can't fix in TypeScript.

First, that error message should say SyntaxError: Cannot use import statement outside an ES module. As written the error message suggests that you could use import in a CommonJS module, which is debatable.

I can fix the error by switching to JavaScript. This suggests that the problem is in tsconfig.json, which JavaScript doesn't use.

Change index.ts to index.js. In package.json change "main": "lib/index.js", to "main": "src/index.js",. Add "type": "module",.

Success! To test that the JavaScript Cloud Functions are working with ES modules, add this cloud function to index.js:

export const makeUppercase = functions.firestore.document('messages/{docId}').onCreate((snap, context) => {
    const original = snap.data().original;
    functions.logger.log('Uppercasing', context.params.docId, original);
    const uppercase = original.toUpperCase();
    return snap.ref.set({ uppercase }, { merge: true });
});

Open your browser to http://127.0.0.1:4000/functions. In the Firestore tab, start a collection messages. In the document make a field original with a string value hello world. In a moment you should see `uppercase: "HELLO WORLD".

Let's switch back to TypeScript. Change index.js to index.ts. In package.json change src/index.js to src/index.ts.

This throws an error:

` `` functions/src/index.ts does not exist, can't deploy Cloud Functions


In `tsconfig.json` add `"moduleResolution": "node",`.

That error is fixed and we're back to the error

SyntaxError: Cannot use import statement outside a module


What I tried that didn't work:

Change `index.ts` to `index.mts` and in `package.json` change `src/index.ts` to `src/index.mts`.

In `functions` directory,

npm install firebase-admin@latest
npm install firebase-functions@latest
npm install typescript@latest

`package.json` now looks like

```js
{
    "name": "functions",
    "type": "module",
    "scripts": {
        "lint": "eslint --ext .js,.ts .",
        "build": "tsc",
        "build:watch": "tsc --watch",
        "serve": "npm run build && firebase emulators:start --only functions",
        "shell": "npm run build && firebase functions:shell",
        "start": "npm run shell",
        "deploy": "firebase deploy --only functions",
        "logs": "firebase functions:log"
    },
    "engines": {
        "node": "16"
    },
    "main": "src/index.mts",
    "dependencies": {
        "firebase-admin": "^11.2.0",
        "firebase-functions": "^4.0.1"
    },
    "devDependencies": {
        "@typescript-eslint/eslint-plugin": "^5.12.0",
        "@typescript-eslint/parser": "^5.12.0",
        "eslint": "^8.9.0",
        "eslint-config-google": "^0.14.0",
        "eslint-plugin-import": "^2.25.4",
        "firebase-functions-test": "^0.2.0",
        "typescript": "^4.8.4"
    },
    "private": true
}

In tsconfig.json:

Change "module": "commonjs", to "module": "ESNext",. It would be better to leave this withcommonJSas you can then import bothcommonJSandES` modules.

Change "target": "es2017" to "target": "ESNext". This updates to the latest ECMAScript.

Switch strict to false.

Change outDir to src.

My tsconfig.json now looks like this:

{
  "compilerOptions": {
    "module": "ESNext",
    "moduleResolution": "node",
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "outDir": "src",
    "sourceMap": true,
    "strict": false,
    "target": "ESNext"
  },
  "compileOnSave": true,
  "include": [
    "src"
  ]
}

It's still throwing the error

SyntaxError: Cannot use import statement outside a module

I believe there's something else misconfigured in tsconfig.json because if we switch back to JavaScript the code runs.

[REQUIRED] Expected behavior

When you add a document with a field original in the Firestore emulator, a few minutes later a field uppercase is added to the document.

[REQUIRED] Actual behavior

Throws error SyntaxError: Cannot use import statement outside a module

firebase emulators:start --debug

[2022-10-26T16:08:19.482Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"] [2022-10-26T16:08:19.483Z] > authorizing via signed-in user (thomasdkehoe@gmail.com) [2022-10-26T16:08:19.580Z] java version "19" 2022-09-20

[2022-10-26T16:08:19.581Z] Java(TM) SE Runtime Environment (build 19+36-2238) Java HotSpot(TM) 64-Bit Server VM (build 19+36-2238, mixed mode, sharing)

[2022-10-26T16:08:19.586Z] Parsed Java major version: 19 i emulators: Starting emulators: functions, firestore {"metadata":{"emulator":{"name":"hub"},"message":"Starting emulators: functions, firestore"}} [2022-10-26T16:08:20.263Z] [logging] Logging Emulator only supports listening on one address (127.0.0.1). Not listening on ::1 [2022-10-26T16:08:20.264Z] [firestore] Firestore Emulator only supports listening on one address (127.0.0.1). Not listening on ::1 [2022-10-26T16:08:20.264Z] [firestore.websocket] websocket server for firestore only supports listening on one address (127.0.0.1). Not listening on ::1 [2022-10-26T16:08:20.264Z] assigned listening specs for emulators {"user":{"hub":[{"address":"127.0.0.1","family":"IPv4","port":4400},{"address":"::1","family":"IPv6","port":4400}],"ui":[{"address":"127.0.0.1","family":"IPv4","port":4000},{"address":"::1","family":"IPv6","port":4000}],"logging":[{"address":"127.0.0.1","family":"IPv4","port":4500}],"firestore":[{"address":"127.0.0.1","family":"IPv4","port":8080}],"firestore.websocket":[{"address":"127.0.0.1","family":"IPv4","port":9150}]},"metadata":{"message":"assigned listening specs for emulators"}} [2022-10-26T16:08:20.275Z] [hub] writing locator at /var/folders/_r/0dhg_r457r97_vy_3y7k2_9r0000gn/T/hub-triggerable-functions-project.json [2022-10-26T16:08:20.547Z] [functions] Functions Emulator only supports listening on one address (127.0.0.1). Not listening on ::1 [2022-10-26T16:08:20.547Z] [eventarc] Eventarc Emulator only supports listening on one address (127.0.0.1). Not listening on ::1 [2022-10-26T16:08:20.547Z] late-assigned ports for functions and eventarc emulators {"user":{"hub":[{"address":"127.0.0.1","family":"IPv4","port":4400},{"address":"::1","family":"IPv6","port":4400}],"ui":[{"address":"127.0.0.1","family":"IPv4","port":4000},{"address":"::1","family":"IPv6","port":4000}],"logging":[{"address":"127.0.0.1","family":"IPv4","port":4500}],"firestore":[{"address":"127.0.0.1","family":"IPv4","port":8080}],"firestore.websocket":[{"address":"127.0.0.1","family":"IPv4","port":9150}],"functions":[{"address":"127.0.0.1","family":"IPv4","port":5001}],"eventarc":[{"address":"127.0.0.1","family":"IPv4","port":9299}]},"metadata":{"message":"late-assigned ports for functions and eventarc emulators"}} ⚠ functions: The following emulators are not running, calls to these services from the Functions emulator will affect production: auth, database, hosting, pubsub, storage {"metadata":{"emulator":{"name":"functions"},"message":"The following emulators are not running, calls to these services from the Functions emulator will affect production: \u001b[1mauth, database, hosting, pubsub, storage\u001b[22m"}} ⚠ Your requested "node" version "16" doesn't match your global version "18". Using node@18 from host. {"metadata":{"emulator":{"name":"functions"},"message":"Your requested \"node\" version \"16\" doesn't match your global version \"18\". Using node@18 from host."}} [2022-10-26T16:08:20.554Z] defaultcredentials: writing to file /Users/TDK/.config/firebase/thomasdkehoe_gmail_com_application_default_credentials.json [2022-10-26T16:08:20.557Z] Setting GAC to /Users/TDK/.config/firebase/thomasdkehoe_gmail_com_application_default_credentials.json {"metadata":{"emulator":{"name":"functions"},"message":"Setting GAC to /Users/TDK/.config/firebase/thomasdkehoe_gmail_com_application_default_credentials.json"}} [2022-10-26T16:08:20.558Z] > refreshing access token with scopes: [] [2022-10-26T16:08:20.560Z] >>> [apiv2][query] POST https://www.googleapis.com/oauth2/v3/token [none] [2022-10-26T16:08:20.560Z] >>> [apiv2][body] POST https://www.googleapis.com/oauth2/v3/token [omitted] [2022-10-26T16:08:20.637Z] <<< [apiv2][status] POST https://www.googleapis.com/oauth2/v3/token 200 [2022-10-26T16:08:20.637Z] <<< [apiv2][body] POST https://www.googleapis.com/oauth2/v3/token [omitted] [2022-10-26T16:08:20.656Z] >>> [apiv2][query] GET https://firebase.googleapis.com/v1beta1/projects/triggerable-functions-project/adminSdkConfig [none] [2022-10-26T16:08:20.812Z] <<< [apiv2][status] GET https://firebase.googleapis.com/v1beta1/projects/triggerable-functions-project/adminSdkConfig 200 [2022-10-26T16:08:20.812Z] <<< [apiv2][body] GET https://firebase.googleapis.com/v1beta1/projects/triggerable-functions-project/adminSdkConfig {"projectId":"triggerable-functions-project","storageBucket":"triggerable-functions-project.appspot.com","locationId":"us-central"} ⚠ firestore: Did not find a Cloud Firestore rules file specified in a firebase.json config file. {"metadata":{"emulator":{"name":"firestore"},"message":"Did not find a Cloud Firestore rules file specified in a firebase.json config file."}} ⚠ firestore: The emulator will default to allowing all reads and writes. Learn more about this option: https://firebase.google.com/docs/emulator-suite/install_and_configure#security_rules_configuration. {"metadata":{"emulator":{"name":"firestore"},"message":"The emulator will default to allowing all reads and writes. Learn more about this option: https://firebase.google.com/docs/emulator-suite/install_and_configure#security_rules_configuration."}} [2022-10-26T16:08:20.834Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: auto_download"}} [2022-10-26T16:08:20.834Z] Ignoring unsupported arg: single_project_mode_error {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: single_project_mode_error"}} [2022-10-26T16:08:20.834Z] Starting Firestore Emulator with command {"binary":"java","args":["-Dgoogle.cloud_firestore.debug_log_level=FINE","-Duser.language=en","-jar","/Users/TDK/.cache/firebase/emulators/cloud-firestore-emulator-v1.15.1.jar","--host","127.0.0.1","--port",8080,"--websocket_port",9150,"--project_id","triggerable-functions-project","--single_project_mode",true,"--functions_emulator","127.0.0.1:5001"],"optionalArgs":["port","webchannel_port","host","rules","websocket_port","functions_emulator","seed_from_export","project_id","single_project_mode"],"joinArgs":false} {"metadata":{"emulator":{"name":"firestore"},"message":"Starting Firestore Emulator with command {\"binary\":\"java\",\"args\":[\"-Dgoogle.cloud_firestore.debug_log_level=FINE\",\"-Duser.language=en\",\"-jar\",\"/Users/TDK/.cache/firebase/emulators/cloud-firestore-emulator-v1.15.1.jar\",\"--host\",\"127.0.0.1\",\"--port\",8080,\"--websocket_port\",9150,\"--project_id\",\"triggerable-functions-project\",\"--single_project_mode\",true,\"--functions_emulator\",\"127.0.0.1:5001\"],\"optionalArgs\":[\"port\",\"webchannel_port\",\"host\",\"rules\",\"websocket_port\",\"functions_emulator\",\"seed_from_export\",\"project_id\",\"single_project_mode\"],\"joinArgs\":false}"}} i firestore: Firestore Emulator logging to firestore-debug.log {"metadata":{"emulator":{"name":"firestore"},"message":"Firestore Emulator logging to \u001b[1mfirestore-debug.log\u001b[22m"}} [2022-10-26T16:08:22.018Z] Oct 26, 2022 10:08:21 AM com.google.cloud.datastore.emulator.firestore.websocket.WebSocketServer start INFO: Started WebSocket server on ws://127.0.0.1:9150 {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:21 AM com.google.cloud.datastore.emulator.firestore.websocket.WebSocketServer start\nINFO: Started WebSocket server on ws://127.0.0.1:9150\n"}} [2022-10-26T16:08:22.048Z] API endpoint: http:// {"metadata":{"emulator":{"name":"firestore"},"message":"API endpoint: http://"}} [2022-10-26T16:08:22.048Z] 127.0.0.1:8080 If you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:

export FIRESTORE_EMULATOR_HOST=127.0.0.1:8080

Dev App Server is now running.

{"metadata":{"emulator":{"name":"firestore"},"message":"127.0.0.1:8080\nIf you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:\n\n export FIRESTORE_EMULATOR_HOST=127.0.0.1:8080\n\nDev App Server is now running.\n\n"}} ✔ firestore: Firestore Emulator UI websocket is running on 9150. {"metadata":{"emulator":{"name":"firestore"},"message":"Firestore Emulator UI websocket is running on 9150."}} [2022-10-26T16:08:22.116Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: auto_download"}} [2022-10-26T16:08:22.117Z] Ignoring unsupported arg: port {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: port"}} [2022-10-26T16:08:22.117Z] Starting Emulator UI with command {"binary":"node","args":["/Users/TDK/.cache/firebase/emulators/ui-v1.11.1/server/server.js"],"optionalArgs":[],"joinArgs":false} {"metadata":{"emulator":{"name":"ui"},"message":"Starting Emulator UI with command {\"binary\":\"node\",\"args\":[\"/Users/TDK/.cache/firebase/emulators/ui-v1.11.1/server/server.js\"],\"optionalArgs\":[],\"joinArgs\":false}"}} i ui: Emulator UI logging to ui-debug.log {"metadata":{"emulator":{"name":"ui"},"message":"Emulator UI logging to \u001b[1mui-debug.log\u001b[22m"}} [2022-10-26T16:08:22.256Z] Web / API server started at 127.0.0.1:4000 {"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at 127.0.0.1:4000\n"}} [2022-10-26T16:08:22.256Z] Web / API server started at ::1:4000 {"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at ::1:4000\n"}} i functions: Watching "/Users/TDK/VisualStudioCodeProjects/CloudFunctions/functions" for Cloud Functions... {"metadata":{"emulator":{"name":"functions"},"message":"Watching \"/Users/TDK/VisualStudioCodeProjects/CloudFunctions/functions\" for Cloud Functions..."}} [2022-10-26T16:08:22.379Z] Validating nodejs source [2022-10-26T16:08:24.474Z] > [functions] package.json contents: { "name": "functions", "type": "module", "scripts": { "lint": "eslint --ext .js,.ts .", "build": "tsc", "build:watch": "tsc --watch", "serve": "npm run build && firebase emulators:start --only functions", "shell": "npm run build && firebase functions:shell", "start": "npm run shell", "deploy": "firebase deploy --only functions", "logs": "firebase functions:log" }, "engines": { "node": "16" }, "main": "src/index.mts", "dependencies": { "firebase-admin": "^11.2.0", "firebase-functions": "^4.0.1" }, "devDependencies": { "@typescript-eslint/eslint-plugin": "^5.12.0", "@typescript-eslint/parser": "^5.12.0", "eslint": "^8.9.0", "eslint-config-google": "^0.14.0", "eslint-plugin-import": "^2.25.4", "firebase-functions-test": "^0.2.0", "typescript": "^4.8.4" }, "private": true } [2022-10-26T16:08:24.475Z] Building nodejs source [2022-10-26T16:08:24.475Z] Analyzing nodejs backend spec [2022-10-26T16:08:24.477Z] Could not find functions.yaml. Must use http discovery [2022-10-26T16:08:24.537Z] Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}} [2022-10-26T16:08:24.538Z] Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}} [2022-10-26T16:08:24.540Z] Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}} [2022-10-26T16:08:24.545Z] Oct 26, 2022 10:08:24 AM com.google.cloud.datastore.emulator.firestore.websocket.WebSocketChannelHandler initChannel INFO: Connected to new websocket client {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM com.google.cloud.datastore.emulator.firestore.websocket.WebSocketChannelHandler initChannel\nINFO: Connected to new websocket client\n"}} [2022-10-26T16:08:24.552Z] Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}} [2022-10-26T16:08:24.555Z] Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}} [2022-10-26T16:08:24.827Z] Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:24 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected HTTP/2 connection.\n"}} [2022-10-26T16:08:24.857Z] Serving at port 9005

[2022-10-26T16:08:24.877Z] Got response from //functions.yaml Failed to generate manifest from function source: SyntaxError: Cannot use import statement outside a module [2022-10-26T16:08:24.885Z] Failed to parse functions.yamlincomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line at line 1, column 62: ... rom function source: SyntaxError: Cannot use import statement ou ... ^ {"name":"YAMLException","reason":"incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line","mark":{"name":null,"buffer":"Failed to generate manifest from function source: SyntaxError: Cannot use import statement outside a module\n\u0000","position":61,"line":0,"column":61},"message":"incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line at line 1, column 62:\n ... rom function source: SyntaxError: Cannot use import statement ou ... \n ^"} [2022-10-26T16:08:24.889Z] shutdown requested via //quitquitquit

⬢ functions: Failed to load function definition from source: FirebaseError: Failed to load function definition from source: Failed to generate manifest from function source: SyntaxError: Cannot use import statement outside a module {"metadata":{"emulator":{"name":"functions"},"message":"Failed to load function definition from source: FirebaseError: Failed to load function definition from source: Failed to generate manifest from function source: SyntaxError: Cannot use import statement outside a module"}}

┌─────────────────────────────────────────────────────────────┐ │ ✔ All emulators ready! It is now safe to connect your app. │ │ i View Emulator UI at http://127.0.0.1:4000/ │ └─────────────────────────────────────────────────────────────┘

┌───────────┬────────────────┬─────────────────────────────────┐ │ Emulator │ Host:Port │ View in Emulator UI │ ├───────────┼────────────────┼─────────────────────────────────┤ │ Functions │ 127.0.0.1:5001 │ http://127.0.0.1:4000/functions │ ├───────────┼────────────────┼─────────────────────────────────┤ │ Firestore │ 127.0.0.1:8080 │ http://127.0.0.1:4000/firestore │ └───────────┴────────────────┴─────────────────────────────────┘ Emulator Hub running at 127.0.0.1:4400 Other reserved ports: 4500, 9150

Issues? Report them at https://github.com/firebase/firebase-tools/issues and attach the *-debug.log files.

[2022-10-26T16:08:25.433Z] Oct 26, 2022 10:08:25 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:25 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}} [2022-10-26T16:08:25.466Z] Oct 26, 2022 10:08:25 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead INFO: Detected non-HTTP/2 connection. {"metadata":{"emulator":{"name":"firestore"},"message":"Oct 26, 2022 10:08:25 AM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}

google-oss-bot commented 1 year ago

This issue does not have all the information required by the template. Looks like you forgot to fill out some sections. Please update the issue with more information.

inlined commented 1 year ago

It seems you got steered off course very early on in your process. Though firebase deploy currently builds your functions for you, firebase emulators:start doesn't. I recommend running tsc watch in another terminal while you run your emulators so that you get hot-reloading functions code in the emulator.

Do not try to load any typescript code into node directly. It's not how TypeScript works.

tdkehoe commented 1 year ago

Are you saying that the error SyntaxError: Cannot use import statement outside a module can't be fixed, that I shouldn't set up Firebase Cloud Functions as ES modules (using import and export), and that I should go back to using CommonJS modules (with require and exports)? This is what I've done and my head has stopped hurting. :-)

mustafaekim commented 1 year ago

Our cloud-functions rely on a separate library package that we obtain via npm locally ("ticore": "file:../ticore"). However, we encounter an issue where the cloud functions fail to run with an "cannot use import statement outside a module" error when we modify the tsconfig file of this library and set the module property value to esnext. Is there any alternative to using the commonjs module that would allow us to avoid this problem?

OskarGroth commented 11 months ago

I ran into this same issue.

In package.json change "main": "lib/index.js", to "main": "src/index.ts"

This is the mistake. I made the same change, probably thinking that the default setup template (using firebase init) was wrong for typescript. It's not. The main is supposed to point to the built js file, not the source ts file.

Once you change that back, ES Modules ("target": "ESNext", "module": "ESNext", ...) work just fine.