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Implementing Google reCAPTCHA v3 with Next.js (React)
- This article explains how to implement Google reCAPTCHA v3 with Next.js (React) to protect web applications from spam and abuse, without requiring users to complete challenges such as checking boxes or identifying objects in images. It explains each step in detail, from getting your Google reCAPTCHA keys, creating a reusable React component to handle the reCAPTCHA validation on the client-side, integrating reCAPTCHA into the form, and verifying reCAPTCHA token on the server. It highlights the benefits of using reCAPTCHA v3, provides the code snippets for each implementation step along the way, and adds useful insights regarding best practices for backend middleware and state management (using Jotai). This article serves as a comprehensive guide for developers who want to integrate reCAPTCHA v3 into their Next.js-based web applications.
- reCAPTCHA v3 distinguishes between human and bot traffic in the background and assigns a score based on how likely the user is a bot. This provides a seamless user experience, especially for applications built with modern frameworks like Next.js.
- Before implementing reCAPTCHA v3, you'll need to create a Google reCAPTCHA project and get both your site key and secret key.
- Create a React component called ReCaptchaWrapper.js inside the components folder, which acts as a provider for pages that require reCAPTCHA functionality, and allows access to the getCaptchaToken function that triggers reCAPTCHA verification on the client-side.
- Integrate reCAPTCHA into your form by including the ReCaptchaWrapper component in your form, and calling the getCaptchaToken function when the form is submitted, which returns a reCAPTCHA token sent to the server for validation.
- On the server-side, verify the reCAPTCHA token to ensure it is valid using middleware in Node.js (Express application) + Typescript that sends the token to Google's verification endpoint. If the reCAPTCHA verification fails, then send an error response to the user.
- Benefits of using reCAPTCHA v3 include effectively preventing spam and abuse while providing a smooth, seamless user experience.
- This guide provides detailed code snippets and insights into state management and best practices for backend middleware, making it a comprehensive guide for developers who want to integrate Google reCAPTCHA v3 into their Next.js-based web applications.
- By implementing Google reCAPTCHA v3 with Next.js, developers can protect their web applications from spam and abuse without interrupting the user experience.
- The article assumes basic knowledge of React and Next.js, Node.js and npm/yarn, and a working knowledge of Google reCAPTCHA.
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