This project demonstrates reaction menu for Android and iOS, inspired by the reaction feature in the Signal app. Built using Expo and react-native-reanimated, this example project showcases how to implement smooth, interactive animations for a reaction menu that can be used in messaging apps.

Check out the reaction menu in action 👇:

• Cross-Platform Support: The reaction menu works on both Android and iOS, with platform-specific adjustments to maintain a native feel.
• Interactive Bounce Effect: Clicking on a message triggers a subtle bounce effect to enhance user interaction.
• Modal for Reaction Menu: Modal is used to display the reaction menu on top of everything, ensuring a seamless experience across both platforms. For iOS, the fade effect in the modal smooths out the transition of the blur background, complementing the message bounce effect nicely.
• Custom Positioning with Reanimated: In the modal, I capture the message's position on the screen (using Reanimated’s measure function) and display the reaction menu at the exact location, creating the illusion that the message was always there.
• Animated Emoji Bar: The emoji bar appears with a spring-based animation, and each emoji has a slight delay based on its index, providing a fluid and responsive feel.
• iOS Blur Effect: A blur overlay is added as a background for iOS, providing a polished, native appearance.

• Bounce Effect: Upon clicking a message, a bounce effect is triggered using Reanimated. This adds a playful interaction to the messaging experience.

• Modal Implementation: Instead of rendering the reaction menu directly on the screen, I used a modal. In modal I capture the position of the message (using measure from Reanimated to get the pageX, pageY, width, and height of the message). This allows the message to be rendered in the same position inside the modal, so it looks like it never left its original location.

• Entering Animations: The emoji bar and reaction options appear with simple spring-based entering animations. Each emoji is animated with a slight delay to create a staggered appearance, adding a nice flow to the interaction.

• Lightweight Animations: The spring animation is kept light and subtle to avoid excessive visual flair while maintaining an interactive feel. The goal was to strike a balance between responsiveness and simplicity, ensuring the animations are smooth without being distracting.

• iOS-Specific Enhancements: For iOS, a blur effect is added as the modal’s background, which enhances the look and feel of the reaction menu, making it feel more native to the platform.

This project is not a standalone library; it's simply a demo or example implementation. However, if you're interested in building a library on top of this code, that would be greatly appreciated! Contributions are welcome—whether it's a bug fix, a new feature, or general improvements. Feel free to submit a pull request (PR) if you would like to contribute.

• Expo: For simplifying cross-platform mobile development.
• Reanimated: For powering the animations that make this reaction menu interactive and fluid.
• Expo Blur: For adding the iOS-native blur effect.

Feel free to contribute!