How to implement reCAPTCHA in a React application

The article provides a detailed guide on implementing Google reCAPTCHA v2 in a React application and verifying user tokens using a Node.js backend. It begins by explaining CAPTCHA and its purpose as a security measure to differentiate between humans and bots, highlighting reCAPTCHA as a widely used tool developed by Google. The article then delves into the technical steps required to integrate reCAPTCHA into a React app, including obtaining API keys from the Google reCAPTCHA console, setting up a sample React project, and utilizing the react-google-recaptcha library. It also covers the creation of a Node.js server with Express.js to verify response tokens by sending them to Google's API. Additionally, the article introduces an alternative library, Reaptcha, for implementing reCAPTCHA in React, offering different props and instance methods for customization. The tutorial emphasizes the importance of verifying tokens promptly due to their short validity and provides insights into utilizing instance methods for managing the reCAPTCHA widget's state. Overall, the article aims to equip developers with the knowledge to build secure and bot-free React applications by effectively implementing and verifying reCAPTCHA.