How install Typescript to laravel 9 + inertia (vue3) ?

I just installed Vue 3 / Inertia using the Breeze scaffolding and after a few simple changes, TypeScript seemed to work: https://laravel.com/docs/9.x/starter-kits#breeze-and-inertia

• Rename app.js and bootstrap.js to app.ts and bootstrap.ts (and the vite.config.js file too, if you like)
• In app.blade.php change the vite directive to point to the ts file: @vite('resources/js/app.ts')
• In vite.config.ts change app.js to app.ts

In any Vue SFC, set the language to "ts" and start using TypeScript. For example, in Login.vue this worked for me:

<script setup lang="ts">

function sayHello(name:string): string {
  return `Hello ${name}`;
}

</script>

For specific TS related config, you might have to use a tsconfig.json file.