Reference

Configuration: Customizing the configuration of a Hilla application for both the development environment and for execution.
Endpoint generator: The endpoint generator produces TypeScript files based on the information from an OpenAPI document that’s generated from Java (or other JVM language) files.
Feature flags: You can enable preview features with feature flags. Preview features are unstable, and the behavior, API, and/or look and feel of these features might change before and if they become a stable feature.
Type conversion: Understanding conversion of data types from Java to TypeScript and vice versa.
Type nullability
TypeScript client: Understanding the Hilla TypeScript client library, the default TypeScript client, and generated client modules.