Svelte News App

screenshot of Svelte News App

Svelte News App

The frontend of an example fullstack app built using svelte and node


The Svelte News App is a fullstack application built with Svelte/Sapper as the frontend framework and Node/Express as the backend. It showcases a range of features such as authentication, routing, error handling, and data handling. The application demonstrates how to build a complete fullstack application using Svelte/Sapper and Node/Express, making it a valuable resource for developers looking to learn these technologies.


  • Authentication/Authorization with JWT: The app supports user authentication and authorization using JSON Web Tokens (JWT).
  • Maintaining logged-in user data with sessions and cookies: The application handles the storage and management of user data throughout the session using sessions and cookies.
  • Routing: The app implements routing capabilities to navigate between different pages and components seamlessly.
  • Communicating with a backend API: It showcases how to communicate with a backend API to fetch and send data.
  • Handling errors: The application effectively handles errors that may occur during user interactions or API requests.
  • Pagination: The app demonstrates how to implement pagination to manage large sets of data.
  • Loading states: It provides loading states to indicate when data is being fetched from the backend.
  • Preloading data: The app preloads data to enhance the performance and responsiveness of the application.
  • Rendering nested components recursively: It showcases the ability to render nested components recursively for complex UI structures.


To run the Svelte News App, follow these steps:

  1. Download the repository
  2. Create a .env file in the root directory
  3. Add API_BASE_URL=http://localhost:5000 to the .env file (assuming the backend is running on localhost:5000)
  4. Run npm install to install the dependencies
  5. Run npm run dev to start the development server

To build and run the application in production mode, follow these additional steps:

  1. Run npm run build to build the project
  2. Run npm run start to start the production server

For detailed instructions on how to build the Svelte News App from scratch, refer to the regularly updated blog of the author.


The Svelte News App is a fullstack application built with Svelte/Sapper and Node/Express. It provides valuable insights into building a complete fullstack application using these technologies. The app showcases a range of features such as authentication, routing, error handling, and data handling, making it a useful resource for developers wanting to learn Svelte/Sapper and Node/Express. The application's code can be obtained from the provided repository, and detailed instructions on building it from scratch are available on the author's blog.


Svelte is a modern front-end framework that compiles your code at build time, resulting in smaller and faster applications. It uses a reactive approach to update the DOM, allowing for high performance and a smoother user experience.


RollupJS is a popular and efficient JavaScript module bundler that takes the code from multiple modules and packages them into a single optimized file, minimizing the overall size of the application and improving its performance.