BUG: Does not support prettier.config.ts, recently added in Prettier v3.5.0

[taep96]

Summary

Does not support prettier.config.ts, recently added in Prettier v3.5.0

Steps To Reproduce:

1. Run prettier-vscode
2. Check the output

Expected result

Working properly, like the CLI

Actual result

Errors

VS Code Version:

Version: 1.97.0

Prettier Extension Version:

11.0.0

Prettier Log Output

["ERROR" - 8:16:51 PM] Unknown file extension ".ts" for /path/to/prettier.config.ts
TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /path/to/prettier.config.ts
    at Object.getFileProtocolModuleFormat [as file:] (node:internal/modules/esm/get_format:177:9)
    at defaultGetFormat (node:internal/modules/esm/get_format:220:36)
    at defaultLoad (node:internal/modules/esm/load:142:22)
    at async ModuleLoader.load (node:internal/modules/esm/loader:555:7)
    at async ModuleLoader.moduleProvider (node:internal/modules/esm/loader:434:45)
    at async link (node:internal/modules/esm/module_job:87:21)
["ERROR" - 8:16:51 PM] Invalid prettier configuration file detected. See log for details.
["ERROR" - 8:19:53 PM] Invalid prettier configuration file detected.

[taep96]

@itsyoboieltr @fisker

[tryforceful]

Is there any way we can set NODE_OPTIONS="--experimental-strip-types" somewhere in VSCode before Prettier runs? 🤔 to help get around this

[kingyue737]

To make TypeScript config files work, Node.js>=22.6.0 is required and Node.js v22 requires --experimental-strip-types.

According to the release note, Node v22 is required. I wonder if it is currently possible for the prettier extension to implement support for ts config, since VSCode ships with Node v20

[fisker]

As mentioned in the Prettier 3.5 release note, maybe we can use tsc to run Prettier.

[eighty4]

Fix for Node users by upgrading to Node 23

Node 23 will let you use prettier with typescript and not require setting the NODE_OPTIONS for experimental type checking. nvm use 23 will fix.

Fix for Bun users using bunx

If you're using bunx prettier to run Prettier with a .ts config, make sure you are on Node 23 as bunx will run with the Node runtime on your path!

Use bunx --bun prettier to run with Bun! 💉 🚀

[taep96]

This issue is about the VSCode extension, not the CLI.