Svelte Preprocess React

Overview

The svelte-preprocess-react is a preprocessor designed to seamlessly use React components within a Svelte app. It is particularly useful when migrating an existing large React codebase to Svelte or when a third-party adapter for Svelte is not yet available. The preprocessor allows developers to gradually convert their components to Svelte and eventually remove the preprocessor from the setup.

Features

• Nesting support: The preprocessor allows for nesting React components inside Svelte templates using the react: prefix.
• Contexts support: The preprocessor supports passing contexts between Svelte and React components.
• SSR (Server-Side Rendering) support: The preprocessor enables Server-Side Rendering for React components used within Svelte apps.
• Hooks support: Developers can use React hooks inside Svelte components by using the preprocessor.
• reactify: The preprocessor provides a function called reactify, which allows using a Svelte component as a React component for cases where other React components depend on it.

Installation

To use the svelte-preprocess-react preprocessor, follow these steps:

1. Add the preprocessReact preprocessor to your svelte.config.js file:

const sveltePreprocess = require('svelte-preprocess-react');

module.exports = {
  // ... other configuration options ...
  preprocess: [
    sveltePreprocess.preprocessReact(),
    // ... other preprocessors ...
  ],
};

2. If you are using other preprocessors like @sveltejs/vite-plugin-svelte or svelte-preprocess, make sure to add the preprocessReact preprocessor as the last one:

const sveltePreprocess = require('svelte-preprocess-react');

module.exports = {
  // ... other configuration options ...
  preprocess: [
    // ... other preprocessors ...
    sveltePreprocess.preprocessReact(),
  ],
};

Now you can start using React components within your Svelte app by prepending the component’s name with the react: prefix. For example, instead of <Button>, you would write <react:Button>.

Summary

The svelte-preprocess-react preprocessor allows developers to seamlessly use React components within a Svelte app. It supports nesting, contexts, Server-Side Rendering, and React hooks. The preprocessor is intended as a temporary solution during the migration process from React to Svelte and should be removed once all components have been converted. Using multiple frameworks can add overhead and slow down development, so it is recommended to migrate completely to Svelte.