A baseline `tsconfig.json` is provided below that you can modify as needed. This file needs to be copied into your extension's `js` folder for your IDE to apply the correct settings.
```jsonc
{
// Use Flarum's tsconfig as a starting point
"extends": "flarum-tsconfig",
// This will match all .ts, .tsx, .d.ts, .js, .jsx files
You'll also need to ensure that you run `composer update` in your extension's root directory to ensure that a copy of Flarum core is downloaded to your `vendor` folder. Remember that `vendor` should **not** be committed to Git repositories.