How to integrate Cardano into a web application?

To integrate Cardano into a web application:

1. Choose a Cardano API or SDK (e.g., Cardano Serialization Lib, Blockfrost API).
2. Set up a development environment with your chosen tools.
3. Implement wallet connectivity using standards like CIP-30 for wallet interoperability.
4. Use the API to query blockchain data, such as address balances or transaction history.
5. Implement transaction building and signing, allowing users to send ADA or native tokens.
6. For more complex applications, consider integrating with Plutus smart contracts.
7. Thoroughly test your integration on the Cardano testnet before moving to mainnet.
8. Implement proper error handling and user feedback for blockchain interactions.