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@taeold taeold commented Oct 21, 2025

Upgrades from TypeScript v4.3.5 to v5.9.3.

Upgrades from TypeScript v4.3.5 to v5.9.3. All tests pass successfully.
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Summary of Changes

Hello @taeold, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a critical infrastructure update by upgrading the TypeScript compiler to its latest major version, 5.9.3. This move aims to leverage the newest language features, performance improvements, and type-checking capabilities offered by TypeScript, ensuring the project remains current and robust. The upgrade also aligns the project's dependencies with more recent Node.js versions, which might necessitate further adjustments to accommodate the new TypeScript version's stricter type checks or updated APIs.

Highlights

  • TypeScript Upgrade: The project's TypeScript dependency has been significantly upgraded from version 4.3.5 (resolved to 4.9.5) to the latest stable version, 5.9.3. This is a major version bump and is marked as a breaking change.
  • Node.js Engine Requirement Update: The minimum Node.js engine requirement for the TypeScript package itself has been updated from >=4.2.0 to >=14.17, reflecting modern development standards.
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Code Review

This pull request upgrades TypeScript to v5.9.3, which is a significant major version upgrade that can introduce breaking changes. It is great that the PR title marks this as a BREAKING change. However, the PR description is minimal. For a change of this magnitude, it would be beneficial to include details about the verification process. For example, confirming that the project builds successfully (npm run build) and all tests pass (npm run test) with the new TypeScript version would provide more confidence in the change. Additionally, I've left a comment regarding the engines field in package.json which should be updated to reflect the new Node.js version requirement from TypeScript v5.

@taeold taeold merged commit 335d241 into next Oct 21, 2025
15 checks passed
@github-project-automation github-project-automation bot moved this from Approved [PR] to Done in [Cloud] Extensions + Functions Oct 21, 2025
@taeold taeold mentioned this pull request Oct 21, 2025
github-merge-queue bot pushed a commit that referenced this pull request Nov 4, 2025
* BREAKING: Upgrade TypeScript to v5.9.3 (#1746)

Upgrades from TypeScript v4.3.5 to v5.9.3. All tests pass successfully.

* BREAKING: Drop Node.js 14/16 support, require Node.js >=18 (#1747)

* BREAKING: Drop Node.js 14/16 support, require Node.js >=18

- Update package.json engines to require Node.js >=18.0.0
- Upgrade @types/node from v14 to v18
- Update TypeScript target from ES2019 to ES2022
- Add useDefineForClassFields: false for backward compatibility
- Update CI/CD workflows to test Node.js 18, 20, 22, and 24
- Set default CI/CD Node.js version to 24
- Update integration test documentation

* BREAKING: remove functions.config() implementation (#1748)

Replace functions.config() implementation with an error that provides
clear migration guidance to the params module. This removes the deprecated
API as planned for the next major release while helping developers migrate.

The error message directs users to:
https://firebase.google.com/docs/functions/config-env#migrate-config

* chore: migrate to ESLint v9 and Flat Config (#1753)

Upgraded eslint to v9 and replaced the legacy .eslintrc.js with the new eslint.config.js format.

Applied minor fixes to 4 files (renaming unused catch variables to _e and one small refactor) to satisfy slightly stricter baseline rules from updated plugins.

Mostly doing this due to our upgrade in TS to latest v5 version which the old versions of eslint ts plugins no longer support.

* chore: enable esModuleInterop (#1751)

* feat: add async error handling to onRequest (#1755)

BREAKING CHANGE: Unhandled errors in async onRequest handlers now immediately return a 500 Internal Server Error instead of hanging until timeout. This may affect clients relying on 504 Gateway Timeout for retry logic.

* BREAKING: Break TS build that uses functions.config() (#1757)

Type out `functions.config()` API. Use of `functions.config()` API should now cause a BUILD error at compile time.

```ts
import * as functions from "firebase-functions";
import {onRequest} from "firebase-functions/https";
import * as logger from "firebase-functions/logger";

const cfg = functions.config()

export const helloWorld = onRequest((request, response) => {
  logger.info("Hello logs!", cfg);
  response.send("Hello from Firebase!");
});
```
```bash
$ npm run build

> build
> tsc

src/index.ts:5:23 - error TS2349: This expression is not callable.
  Type 'never' has no call signatures.

5 const cfg = functions.config()
                        ~~~~~~


Found 1 error in src/index.ts:5
```

* Add Firebase Data Connect v2 support (#1727)

* Add Firebase Data Connect v2 support

* Export dataconnect

* Fix export

* Rename Extract to VarName, since Extract is a built in type

* Include auth context in event payload

* Stronger typing for data connect params

* Fix formatting and address comments

* Apply another suggestion

* Add region and fix bug in which event.service, event.connector, event.operation gets populated

* Remove locations/... segment

* Address comments

* Fix linter

* feat: enable ESM support via dual-publishing (#1750)

- Configure tsdown to build both CJS and ESM outputs.
- Update package.json exports to support both 'require' and 'import'.
- Fix type hygiene issues by using explicit 'export type'.
- Update protos/update.sh to generate ESM version of compiledFirestore and fix its imports for Node.js compatibility.
- Configure build aliases to handle relative paths to protos correctly in both CJS and ESM builds.
- Add packaging integration test to CI.

~Note: I enabled `esModuleInterop` in tsconfig.release.json to support default imports from CommonJS modules (like cors), which is required for proper ESM interop. This caused some chain-effect that required updating several unit tests and source files to use default imports for other CJS dependencies (e.g., fs, nock, jsonwebtoken) to align with the new compiler configuration.~ Fixed in #1751.

* lock down permission per GitHub alert.

* update lint rule to enforce prettier rules.

* chore: update CHANGELOG for v7.0.0

* format.

---------

Co-authored-by: Lisa Jian <ljian997@gmail.com>
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