React Examples

The examples on this page use Tailwind CSS for styling and Framer Motion for animations. These examples all use the fine-grained-reactivity components so that the parent component renders only once and all renders are optimized to be as small as possible.

Persisted global state

This example creates a global state object and persists it to Local Storage. Try changing the username and toggling the sidebar and refreshing - it will restore it to the previous state.

Auto-saving Form

This example uses the useObservableQuery hook to create an observable using TanStack Query that automatically sends mutations back to the server whenever the observable changes.

It then uses the Reactive two-way binding components to bind those observable directly to the inputs.

So in effect this binds the inputs directly to your server data.

Form validating

This example uses useObserve to listen to changes in the form state to update the error messages as you type. It waits for the first click of the Save button for a better user experience.

List of messages

This example uses the useFetch hook to get data from a server as an observable, useComputed to create a computed observable, and For to display the array of messages in a high-performance way.

Animations with reactive props

This example uses reactive to make a version of motion.div with reactive props that can animate using observable values. Animating with reactive props is faster than re-rendering the whole component because when the tracked observable changes it triggers a render of only the motion.div, so it doesn’t need to re-render the parent or children.

This example also creates a computed observable text value from the boolean and renders it directly in JSX, which (under the hood) creates a reactive text element that re-renders itself when it changes.

This example uses Show to show/hide a modal based on an observable value, and Switch to render the active page in the modal.