In a new post on his blog Sebastian De Deyne, multi disciplinary wizard at Spatie, explains how to set up TypeScript in a typical Laravel app.

In a recent Spatie project we decided to give TypeScript a shot for the business critical part of a new application. TypeScript provides static analysis to reduce the chance of introducing bugs, to have self-documenting code, and to improve our tooling (autocompletion!) Adding TypeScript support is pretty straight forward and is done in three steps: install the necessary dependencies, configure TypeScript, and finally configure Laravel Mix.

https://sebastiandedeyne.com/posts/2017/typescript-with-laravel-mix