Comment résoudre les problèmes de compatibilité frontale avec les systèmes back-end ?

You can use various tools like postman, insomnia, etc which are api testing tools, you can mock what data you have to send and check the response and then accordingly validate if such a response can be handled by your frontend.

There are couple of troubleshooting skills which will embed while working with both systems. Majorly we need to figure out the variables or components needed for the front end application to function properly from Backend API requests. This can we also contribute to network integration too as both the systems will connected in one network so the response can be monitored through any monitoring tool too. We can improvise on Logging mechanism on both systems to check if the request has reached else trying to mock the system with Postman Requests. This requires proper authentication, connection with proper header and request body to have correct connection between frontend and backend application.

This is the dumbest thing ever, but if you get stuck on something you think could be a network issue, consider making sure all your 200s are 200s. I've yet to find a workplace where some API didn't return things like 200, { success: false } when a 400/500 should have been returned. Also, some devs like to throw 400s when the data source returns an empty list. This will get you sometimes, too. I guess my point is: learn how to access and read your backend code. Everyone makes mistakes and won't always consider every edge case. If you can spot errors, you will become more productive and make yourself more valuable.

I suggest always start with a well defined and scalable contract that works in both ways and holds the basic for communication between backend and frontend. Regardless the protocol or technology used, it should work the same. That includes endpoints definition, security and response handling. Once you had it any new features can be implemented frontend to backend or backend to frontend without any issue.

Test the API. The API is the layer that mediates communication between the front-end and back-end systems. Use a tool like Postman to test the API endpoints and parameters that are being used by the front-end application. Make sure that the API is returning the expected results and that it is not generating any errors.

Any sort of unit testing, from a simple collection of requests, a spec, a tool like cURL, postman, or a script that can give you a fast way to test that the API is being compliant with its contract should be good, the important part here is to have the confidence on the results that its working or not.

Swagger is a best tool for documentation APIs. Usually I use it on my projects and we use Postman for teamwork . I test each API with them before send them to Front-End team. Now I work with GraphQL , I hope it goes well.

Un API es un bloque de códigos que tiene como objetivo comunicar información entre 2 sistemas. Para poder probar dicha API, existen infinidad de herramientas, siendo la más conocida Postman. Para asegurarnos de que la API es óptima, podemos realizar una prueba unitaria , estres(Jmeter). También se recomienda que las API se desarrollen con el modelo de madurez de Richardson y tengan problemas de seguridad.

It is necessary to make sure that requests are being made correctly. To do this, it is important to ensure that API calls on the frontend are in accordance with specifications, using Postman/Insomnia or another tool to facilitate this process. Also ensure that the CORS policy is properly configured.

Debugging the code is one of the best ways to identify the real cause of the problem, and nip the problem in the bud. Many errors can be found by doing the debug step by step and defining stop points to allow us to understand how the data travels through the application, and we will also understand at what point in the application the error appears, thus making the process of correcting it easier.

Setting up breakpoints to Javascript might become a tedious task when we’re facing with a big amount of Javascript being used at once. If you suspect some part of the script might be the source of the problem, using the reserved keyword ‘debugger’ before or after the line will be a time saver.

Also worth mentioning: when we know issue is on BE side but can't pinpoint it easily due to various reasons (cannot reproduce, cannot run locally, etc) what usually helps is adding additional logging or depending on the code lowering the logging level.

have some good pieces of code isolated and tested, run some randomized or exploratory tests on your code or a full Test program into it, having to debug big chunks of code is stressful and error prone, keep it simple and test every single small change, that way spotting the error is easier

Utilizing browser developer tools like Chrome DevTools or Firefox Developer Tools to inspect the network tab. This allows me to delve into the specifics of each request and response, paying close attention to any errors, warnings, or anomalies. This step often uncovers critical information about how the front-end and back-end are communicating, which can lead to more efficient issue resolution. It's a fundamental step in troubleshooting front-end compatibility with back-end systems, and can provide vital insights into the connection, authentication, data format, or server response. This initial check can save a lot of time in the debugging process.

Here are two additional valuable tools at your disposal when using Visual Studio Code: Live Server: This tool allows you to view real-time updates in your browser for static HTML, CSS, and JavaScript files, enhancing your web development workflow. You can see how changes affect the look and behavior of your page. Remote SSH: With the Remote SSH extension, you can efficiently test your applications on remote machines by connecting to an SSH server. Additionally, it grants you the convenience of accessing files on other remote machines, streamlining collaborative development efforts. This extension enables you to code, debug, and run tasks on remote machines, making it a powerful tool for remote and collaborative development scenarios.

Dev tools allow you to simulate network and CPU throttling, also allow you to quickly simulate different sizes and devices view ports, so take advantage of those combinations to test the limits of your code.

Simulating different environments to thoroughly test front-end compatibility with back-end systems. This includes varying factors like browsers, devices, network speeds, and locations. Tools like BrowserStack, LambdaTest, or Device Mode can be invaluable in testing across diverse environments. This ensures the web application behaves and performs optimally, providing a seamless user experience. It's a crucial step in detecting and addressing compatibility issues that users may encounter in different scenarios. By replicating these environments, you can preemptively resolve potential problems, ensuring a smoother experience for all users.

Establish a collaborative workspace, whether it's hosted locally or in the cloud, that houses both the served backend and the frontend interface. Additionally, ensure the availability of a comprehensive API documentation, ideally shared through a Postman collection. This shared environment not only facilitates routine team updates but also fosters mutual understanding and awareness of each other's tasks, ultimately enhancing collaboration. Often, developers have specific expectations when it comes to the format of response data they receive or the structure of requests they send. These expectations make for smoother interactions when everyone on the team shares a common understanding.

Maintaining clear and consistent communication with the entire team. This involves regular updates and discussions with both back-end and front-end developers, as well as other stakeholders. Tools like GitHub, GitLab, or Bitbucket are invaluable for code management and collaboration. Actually, I disagree with underestimating the significance of communication in this process. It's the backbone of a successful project. By utilizing platforms like Slack, Discord, or Zoom, you can ensure that everyone is on the same page. This allows for swift issue reporting, collaborative problem-solving, and effective feedback sharing. Such transparency is key to overcoming compatibility challenges.

Use network tab in your browser's developer tools to see which requests are failing or returning errors. and to identify specific API requests that are not working correctly. Verify backend logs for any error messages related to incoming requests that needs to be handled on backend side. Make sure that API specifications are updated whenever there is a change in the model classes to make sure that there won't be any issues on data types and same type is referred( Swagger UI).

Note that communication isn't a one size fits all thing. Understand how different team members like to be communicated with. Have tips/tricks handy for conflict resolution. Also, tone is very important in communication.

document everything in a journal, or a reproducible environment configuration with tests would be awesome. being able to replicate the conditions of a test makes great communication, be transparent and raise your hand when in doubt or when you fins interesting behavior.

- Take your time and clearly define problems and goals - Step away if needed; take breaks - Rome wasn't built in a day - Work one problem at a time (segregate back-end and front-end issues) - Work backwards from a problem - Plan the work and work the plan - Save time by writing comments, writing code, and then debug and test over debugging and testing every couple of new lines of code written

I think one of the best solutions for making APIs and services clear and integrated is to use a code generator, We can run it and in a few seconds, our services get all new changes. Prevents so many conflicts and back and forth between front-end and back-end teams.

Handle shared data between Front-end and Back-end Firstly, having a specific data structure is essential that provides less conflicting and almost the same keys. Secondly, refactoring is a way to make code better or even worse, this must be into account to updating a code related to shared data this must apply also to the other side. Lastly, working with the Front-end and Back-end side by side and synchronising sometimes creates a complex situation to prevent from that have an obvious flow of work and dividing a task into small parts is vital.

In front-end systems you are mainly focused on the display. If your front end is not compatible with the back end then really your front end should be the thing that changes, as it can be much more difficult to change the back end: - Check your HTTP verbs when calling into the back end, GET calls work fine for any unsecured data, POST and PUT are used for secure data like login. - Make sure your code reads and responds in JSON, this is the most common data exchange format in wide use today. - Check your call headers and then you need to check for CORS headers and settings from the back end. These are easily the most common problems I see today, once solved you should have relatively little problems connecting to any back end.

The APIs must show clear information whether we are expecting an expected error or not, for example if an internal error occurs, it must show us the error code and a clear description.