React VS Svelte...10 Examples

Step-by-Step Tutorial: React vs Svelte - 10 Key Comparisons

1. Understand the Basics of React and Svelte:

   • React and Svelte both help developers build reactive user interfaces with JavaScript using reusable components.
   • React uses a virtual DOM runtime to track data changes and render them in the actual DOM, while Svelte uses a compiler to convert code into vanilla JavaScript without the need for a runtime.

2. Rendering in React vs Svelte:

   • React requires an initial JavaScript runtime, resulting in a baseline of around 70 kilobytes in frameworks like Next.js.
   • Svelte, on the other hand, compiles code into vanilla JavaScript, leading to smaller bundle sizes and more efficient performance.

3. Working with Component State:

   • In React, use the useState hook to create reactive state in functional components.
   • In Svelte, define reactive state within the script tags by creating variables with the let keyword and mutating values directly.

4. Passing Props Between Components:

   • In React, pass props by defining them as function arguments.
   • In Svelte, use the export keyword to pass variables from the outside, making it easier to match variable names to props.

5. Handling Props and Children:

   • React allows passing components as props and rendering them directly in JSX.
   • In Svelte, use slots to insert UI at specific points, providing more flexibility in component composition.

6. Managing Side Effects and Computed State:

   • In React, use the useEffect hook for side effects and computed state, ensuring the code runs only when specific dependencies change.
   • In Svelte, use reactive declarations to rerun code based on dependent data changes, offering a concise and reliable way to manage state.

7. Conditional Logic and Templating:

   • React uses JSX for templating, while Svelte has its templating approach that integrates JavaScript seamlessly.
   • Svelte's compiler allows for more readable conditional statements directly in HTML, offering a more straightforward approach to templating.

8. Looping Over Data:

   • In React, use the map function to loop over arrays and define UI for each item.
   • In Svelte, loop over data using template variables for each item and specify keys for efficient rendering.

9. Shared State Management:

   • For shared state in React, consider using state management solutions like MobX or Redux.
   • In Svelte, utilize writable stores to represent reactive data throughout the application with minimal boilerplate code.

10. Handling Promises and Error States:

• React introduces the use of suspense for handling promises, loading states, and errors, requiring a deeper understanding of React's ecosystem.
• Svelte simplifies promise handling by allowing direct unwrapping in templates, making it easier for developers familiar with promises.

By following these 10 key comparisons between React and Svelte, you can gain a better understanding of their differences and choose the framework that best suits your development needs.