How to Use View Transitions in Remix for Smooth UI Changes

In Remix, you can use the View Transitions API to create smooth animations between UI states by wrapping navigation or state changes inside document.startViewTransition(). This lets you animate page changes or component updates seamlessly without extra libraries.

Syntax

The basic syntax to use view transitions in Remix involves calling document.startViewTransition() with a callback that performs the UI update or navigation. The browser then animates the change between the old and new views.

Key parts:

• document.startViewTransition(callback): Starts the transition and runs the callback to update the UI.
• callback: A function where you perform the UI change, like navigation or state update.

javascript

document.startViewTransition(() => {
  // Perform UI update here, e.g., navigation or state change
});

Example

This example shows how to use view transitions in a Remix component to animate navigation between routes. When clicking the button, the page transition animates smoothly.

jsx

import { useNavigate } from "@remix-run/react";

export default function ViewTransitionExample() {
  const navigate = useNavigate();

  function handleClick() {
    if (document.startViewTransition) {
      document.startViewTransition(() => {
        navigate("/about");
      });
    } else {
      // Fallback if View Transitions API is not supported
      navigate("/about");
    }
  }

  return (
    <main style={{ padding: "2rem", fontFamily: "Arial, sans-serif" }}>
      <h1>Home Page</h1>
      <button onClick={handleClick} aria-label="Go to About page">
        Go to About
      </button>
    </main>
  );
}

Output

A page with a heading 'Home Page' and a button labeled 'Go to About'. Clicking the button smoothly transitions to the About page if supported.

Common Pitfalls

Common mistakes when using view transitions in Remix include:

• Not checking if document.startViewTransition exists, causing errors in unsupported browsers.
• Performing asynchronous operations inside the callback, which should be synchronous to allow the browser to capture the transition.
• Not wrapping navigation or UI updates inside the callback, so no animation occurs.

javascript

/* Wrong way: Async operation inside callback */
document.startViewTransition(async () => {
  await fetchData(); // This delays the transition capture
  navigate('/next');
});

/* Right way: Keep callback synchronous */
document.startViewTransition(() => {
  navigate('/next');
});

Quick Reference

Tips for using view transitions in Remix:

• Always check for document.startViewTransition support before using.
• Wrap navigation or state changes inside the callback for smooth animation.
• Keep the callback synchronous; do async work before or after the transition.
• Use semantic HTML and ARIA labels for accessibility during transitions.

Key Takeaways

Use document.startViewTransition to wrap UI updates for smooth animations in Remix.

Always check if the View Transitions API is supported before using it.

Keep the callback synchronous to let the browser capture the transition correctly.

Wrap navigation or state changes inside the callback to animate page or component changes.

Use semantic HTML and accessibility attributes to maintain usability during transitions.