# TypeScript v4.9.3 — Release & Upgrade Intelligence
- **Product:** TypeScript (https://typescriptlang.org)
- **Version:** v4.9.3
- **Released:** Nov 17, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/typescript/updates/v4.9.3/

## Executive Summary (TL;DR)
TypeScript v4.9.3. Source highlight: For release notes, check out the release announcement.

## New Features
- 2c12b1499908ad7718e65d20e264561207c22375 Add a GH Action to file a new issue if we go a week without seeing a typescript-error-deltas issue (#51271)
- f6cf51053e024714dd6b8463fe6f8e7e33461e6b Add more tracing to node16/nodenext resolution (#51168)
- be5f0fe5acfed5146514ebe7c1b65529def8e490 Add an extra regression test for awaited unresolvable recursive union (#51167)
- cf1b6b73330eab2dd484d71cbdb662a83b3c726f feat(51163): show QF to fill in the missing properties for the mapped type. (#51165)
- 0ce72ef6c8b39cd2d07e5b0eb3a0c144a7783ad2 Add option to OrganizeImports for removal only (#50931)
- 42f9143e114c5c07f40df83ed07ffeb3cbaf2101 feat: codefix for `for await of` (#50623)

## Improvements
- d90795e799ca8e41aabd6d0852abb585138200ef Improve escape sequence handling in private names (#50856)
- a11c41621bbbab100a391dd348651c6661549663 Improve checking of `in` operator (#50666)
- 48a8e8953a1e609970dc85e08f99ac499bfe8356 Improve check of whether type query node possibly contains reference to type parameter (#50070)

## Bug Fixes
- a7a9d158e817fcb0e94dc1c24e0a401b21be0cc9 Fix for broken baseline in yieldInForInInDownlevelGenerator (#51345)
- 7f8426f4df0d0a7dd8b72079dafc3e60164a23b1 fix for-in enumeration containing yield in generator (#51295)
- 3d2b4017eb6b9a2b94bc673291e56ae95e8beddd Fix assertion functions accessed via wildcard imports (#51324)
- 64d0d5ae140b7b26a09e75114517b418d6bcaa9f fix(51301): Fixing an unused import at the end of a line removes the newline (#51320)
- 754eeb2986bde30d5926e0fa99c87dda9266d01b Update CodeQL workflow and configuration, fix found bugs (#51263)
- d4f26c840b1db76c0b25a405c8e73830a2b45cbc fix(51245): Class with parameter decorator in arrow function causes "convert to default export" refactoring failure (#51256)

## Upgrade Command
```bash
npm install --save-dev --save-exact typescript@4.9.3
```