Placing a Svelte component in a React app

This is a simple example of placing a Svelte component in a React app using Vite with full Typescript support.

Live Deploy

https://svelte-in-react.surge.sh/

Want to play?

1. pnpm i
2. pnpm dev

What Works?

• Types on props
• Passing props into the svelte component through the wrapper
• State and JS/TS inside the svelte component
• Vite bundling it all up
• Nearly the same Svelte and React DevXP when running both.
• Svelte errors show in the dev preview as per normal Svelte Development

Known Issues

• I was getting an import type error where the wrapper pulls the svelte component in when running TSC. This might just require some paths jiggery to sort.
• I'm not sure the component is getting destroyed correctly on unmount. In Dev mode a duplicate of the component is created when a HMR is triggered.
• Strict mode in Dev does not work. It causes useEffect to fire twice thus painting the svelte component twice. This is potentially the cleanup issue above.