How to link frontend to backend application?

I can build complete applications using Java or Python, and I can also create web pages with HTML, CSS, and JavaScript. However, I’m struggling to understand how to make my HTML frontend communicate with my Java or Python backend code.

I’ve spent hours searching for tutorials online but most of them only cover either backend development or frontend development separately. I need to know how to bridge these two parts together.

I’m working on a banking application project and I need the frontend to send data to the backend and receive responses. What are the common methods to establish this connection? Are there specific frameworks or tools I should be using?

banking app sounds exciting! what tech stack are you thinking - java with spring or python with django? have you figured out how you’ll handle auth tokens between frontend and backend? also curious about your database setup since it’ll affect your api design a lot.

To connect your frontend with your backend effectively, you should initiate HTTP requests to your backend API. Utilizing REST or GraphQL is advisable, as both approaches can facilitate robust communication. For example, you can define routes such as /api/account to fetch account details and /api/transaction for transaction processing. Make use of the fetch() API or XMLHttpRequest in JavaScript to execute these requests. Given the sensitivity of banking data, emphasize the need for strict validation and security measures for incoming data. Frameworks like Spring Boot for Java or Flask for Python can greatly simplify your API development.

yo, for connecting frontend to backend, set up those API endpoints to get the data flowin. axios or fetch are your pals in JS to hit those spots. don’t forget, HTTPS is a must for security and check CORS too, it’s a tricky one!