Google reCAPTCHA v3 with Spring Webflux and Angular 19

Welcome, in this story, we’ll learn how to implement Google reCAPTCHA v3 using Spring Webflux and Angular 19.

· Prerequisites
· Overview
∘ What is reCAPTCHA?
∘ Google reCAPTCHA type
· Why use reCaptcha v3
· Getting Started
∘ Setting up reCaptcha
∘ Client-side application with Angular
∘ Server-side application with Spring Webflux
· Project Structure
· Testing
· Conclusion
· References

Last updated: May 18, 2025

Prerequisites

This is the list of all the prerequisites for following this story:

• Node.js and npm
• Angular CLI
• Java 17+
• Spring Boot / WebFlux 3+
• MongoDB instance (v6 or later) installed
• Maven 3.6.3
• Google Account
• Basic knowledge of Angular and TypeScript (Angular 19 or later)
• IntelliJ IDEA, Visual Studio Code, or another IDE