Reanimated 4.6.0: What's New and How to Upgrade
Reanimated 4.6.0 brings exciting updates to developers using React Native, a popular framework for building mobile apps. This release supports the latest React Native versions and introduces new features that enhance animation capabilities. Let's explore what these changes mean for you, who is affected, and how to safely upgrade.
What changed
The latest version of Reanimated, 4.6.0, now supports React Native versions from 0.83 to 0.87. This means if you're using any of these React Native versions, you can seamlessly integrate Reanimated into your projects. Additionally, this update includes support for CSS animation and transition callbacks on both iOS and Android platforms. In plain English: your animations can now react to CSS events like starting, ending, or canceling, providing more control and interactivity.
Another significant addition is the contrastColor utility. This function helps you determine whether 'white' or 'black' would be more visible against a given background color. It ensures your text or elements are always readable, enhancing accessibility. This utility can be used within useAnimatedStyle and other worklets, which are small pieces of JavaScript code that run on a separate thread for smoother animations.
Lastly, an experimental feature enables platform-driven CSS transitions on Android. This feature allows CSS transitions, like changes in opacity, to run directly on the Android platform, potentially improving performance. However, it's off by default and can be enabled using a feature flag if you wish to experiment with it.
Who is affected
If you're a developer using React Native versions 0.83 to 0.87, this update is relevant to you. The new CSS animation and transition callbacks will particularly benefit those who want to create more interactive and responsive animations in their apps. The contrastColor utility is a boon for developers focused on accessibility, ensuring that text and UI elements are always visible against varying background colors.
Practical impact
For developers, the support for newer React Native versions means you can leverage the latest features and improvements in React Native without worrying about compatibility issues with Reanimated. The CSS animation callbacks provide more hooks into the animation lifecycle, allowing for more complex and responsive animations that can react to user interactions or other events.
The contrastColor utility simplifies the process of ensuring text visibility, making it easier to adhere to accessibility standards. This is particularly useful for apps with dynamic themes or color schemes. Meanwhile, the experimental Android CSS transitions could lead to smoother animations by offloading some work to the platform itself, though this feature is optional and should be tested thoroughly before use.
Action checklist
- Verify that your project is using React Native 0.83 to 0.87 to ensure compatibility with Reanimated 4.6.0.
- Update your project to Reanimated 4.6.0 by modifying your package.json file and running
npm installoryarn install. - Test your existing animations to ensure they behave as expected with the new CSS animation callbacks.
- Experiment with the contrastColor utility to improve text visibility and accessibility in your app.
- If interested, enable the experimental Android CSS transitions using the
ANDROID_CSS_PLATFORM_TRANSITIONSfeature flag and test thoroughly.
When to ignore
If your project is not using React Native 0.83 to 0.87, or if you do not require the new animation features, you may choose to skip this update. Additionally, if your app does not rely heavily on animations or CSS transitions, the changes in this release may not significantly impact your project.
For those using Good Food Pro's multi-restaurant delivery marketplace, staying updated with the latest React Native and Reanimated versions ensures your apps are optimized for performance and user experience. You can explore more about our offerings and how they integrate with these technologies on our features page or documentation.