Datastar helps you build reactive web applications with the simplicity of server-side rendering and the power of a full-stack SPA framework.

Include Datastar with a single 14.5 KiB file and start adding reactivity to your frontend immediately. Write your backend in the language of your choice! Official SDKs are available to help you get up and running even faster, or you can send SSE events directly from your backend.

Datastar looks very interesting!

How to add client-side interactivity to Astro components using native browser JavaScript APIs.

From the docs:

You can add interactivity to your Astro components without using a UI framework like React, Svelte, Vue, etc. using standard HTML <script> tags.

💯 This works as expected!