The homepage left me confused, and also after reading the documentation, I'm not sure what this is.

I tinkered a bit to try it myself.

Turns out you can throw this into your website and it will display "Hello World":

    <script type="module" src="https://pyscript.net/releases/2024.8.2/core.js"></script>
    <script type="py">
        import js
        js.document.querySelector("body").innerText = "Hello World"
    </script>

So it seems to be a script that looks for scripts of type "py" and transpiles them from Python to JavaScript via Pyodide?

On the other hand, the demo on the homepage is a repl. And the title says "platform". So I'm still confused.