I can build complete applications using Java or Python, and I’m comfortable creating web pages with HTML, CSS, and JavaScript. However, I’m stuck when it comes to making my web interface communicate with my server-side code. I’ve been searching online for tutorials but most of them focus on either frontend development or backend development separately, not how to connect them together. I’m working on a financial application project and need to understand how the web page can send data to my Java or Python backend and receive responses back. What are the common approaches to establish this connection between the client-side and server-side parts of a web application?
axios is a great choice for linking your frontend to your backend. you just need to set up the right endpoints on your server like /api/login, then use axios.post() or axios.get() for your data transfers. it works well with both java spring boot and python flask.
You need REST API communication. Set up HTTP endpoints on your backend that accept and return JSON, then have your frontend make HTTP requests to those endpoints. For Java, use Spring Boot with @RestController annotations. For Python, Flask or FastAPI work great. On the frontend, just use the built-in fetch() function. I did this in my last project - frontend sent POST requests with user data to /api/users, server responded with JSON confirmation. Just make sure you handle CORS properly if you’re running on different ports during development.
Oh interesting! Are you building this as a single page app or traditional multi-page setup? What made you pick Java over Python for the backend? The approach changes a bit depending on which you choose. Have you looked at any frameworks yet or still open to suggestions?