Build a Full-Stack CRUD App with React, Svelte, and a Serverless Backend

Majd Muhtaseb11/06/202512 minutes

Introduction

This tutorial will guide you through creating a simple Create, Read, Update, and Delete (CRUD) application utilizing the strengths of both React and Svelte for the frontend, coupled with a serverless backend for data management. We'll demonstrate how these technologies can work together to build a modern, efficient web application.

Serverless Backend (Example with AWS Lambda & API Gateway)

Let's assume you have a simple Lambda function that handles CRUD operations for a "products" resource. The exact implementation depends on your chosen serverless provider (AWS, Azure, Google Cloud) and database (DynamoDB, MongoDB Atlas, etc.). For brevity, we will omit the full backend code. Consider this a placeholder demonstrating the API structure.

Example API Endpoints:

GET /products: Retrieve all products
GET /products/{id}: Retrieve a specific product by ID
POST /products: Create a new product
PUT /products/{id}: Update a product
DELETE /products/{id}: Delete a product

React Component (Product List)

This React component fetches and displays the list of products.

import React, { useState, useEffect } from 'react';

function ProductList() {
  const [products, setProducts] = useState([]);

  useEffect(() => {
    const fetchData = async () => {
      const response = await fetch('/.netlify/functions/products'); // Adjust URL
      const data = await response.json();
      setProducts(data);
    };

    fetchData();
  }, []);

  return (
    <ul>
      {products.map(product => (
        <li key={product.id}>{product.name}</li>
      ))}
    </ul>
  );
}

export default ProductList;

Svelte Component (Product Form)

This Svelte component provides a form for creating or updating products.

<script>
  let name = '';

  async function handleSubmit() {
    const response = await fetch('/.netlify/functions/products', { // Adjust URL
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({ name })
    });

    if (response.ok) {
      name = ''; // Clear the form
      // Refresh the product list (you'll need a mechanism to communicate with React)
      console.log("Product Created!");
    }
  }
</script>

<form on:submit|preventDefault={handleSubmit}>
  <label for="name">Product Name:</label>
  <input type="text" id="name" bind:value={name} />
  <button type="submit">Add Product</button>
</form>

Integrating React and Svelte

You'll likely need a build tool (like Webpack or Parcel) to bundle both React and Svelte components into your application. Micro-frontends architecture or using web components are common approaches here. This tutorial will focus on demonstrating basic functionality instead.

Conclusion

This example illustrates the basic principles of combining React, Svelte, and a serverless backend for CRUD operations. While further development is needed for a production-ready application (error handling, state management, inter-component communication), this provides a starting point for leveraging these powerful technologies together. Remember to adjust API endpoints and serverless function implementations based on your chosen platform.