Building an Optimized Animated Dropdown Component in React Native and Expo

Dropdown Component in React Native and Expo

This guide will build an optimized animated custom dropdown component for the React Native and Expo app. We’ll integrate features like animations, modal overlays, and performance optimizations for large datasets using React.memo, useMemo, and custom hooks.

Project Setup

# create a new expo app
npx create-expo-app@latest rn-expo-animated-dropdown

# navigate to the project directory
cd rn-expo-animated-dropdown

# reset the boilerplate to make the codebase minimal
npm run reset-project

# remove the app-example directory
rm -rf app-example

initial codebase on vs code

Install necessary libraries:

npx expo install react-native-reanimated react-native-gesture-handler @expo/vector-icons

Start the app

npx expo start

running the app on Android Emulator and iOS Simulator side by side

Create Dropdown Component

// components/Dropdown.tsx

import React from 'react';
import { Dimensions…