When building applications with Lit, you want your components to be both fast and efficient. Keeping bundle sizes small, loading only what is needed, and ensuring that rendering is as efficient as possible are all crucial for delivering a smooth user experience. Here are some practical tips for achieving these goals:

• Minimize bundle size:

  • Import only the Lit features you need, and avoid large utility libraries unless absolutely necessary;
  • Use code splitting to separate your application into smaller, more manageable chunks that can be loaded on demand;
  • Remove unused code and dependencies from your project.

• Lazy load components:

  • Load components only when they are required, rather than at the initial page load;
  • Use dynamic import() statements to fetch components as users navigate or interact with your application;
  • This reduces the initial bundle size and speeds up the first render.

• Optimize rendering performance:

  • Use Lit’s fine-grained reactivity to update only the parts of the DOM that have changed;
  • Avoid expensive computations or DOM manipulations inside the render() method;
  • Leverage Lit’s lifecycle methods, such as shouldUpdate(), to skip unnecessary updates;
  • Use memoization for computed values that do not change frequently.

By following these strategies, you can ensure that your Lit components remain lightweight, responsive, and scalable as your application grows.