👀 Views: 706 💬 Answers: 1 📅 Created: 2025-09-13

ajax react fetch promises jQuery JavaScript

I'm updating my dependencies and I'm refactoring my project and I'm working on a personal project and I've searched everywhere and can't find a clear answer..... Currently developing a migration project where we're moving a large legacy jQuery codebase to React. One of the challenges I've encountered is dealing with AJAX calls that rely heavily on promises. In a specific instance, I have an AJAX call that retrieves user data, but I'm struggling with how to handle failures cleanly. The legacy code uses simple callbacks, but I want to implement a more modern approach with `fetch` and promises to ensure better error handling and readability. Here's the original jQuery AJAX snippet: ```javascript $.ajax({ url: '/api/users', type: 'GET', success: function(data) { // Do something with the data }, error: function(jqXHR, textStatus, errorThrown) { console.error('AJAX Error: ', textStatus, errorThrown); } }); ``` And here's my attempt at replacing it with `fetch`: ```javascript fetch('/api/users') .then(response => { if (!response.ok) { throw new Error('Network response was not ok ' + response.statusText); } return response.json(); }) .then(data => { // Handle the user data }) .catch(error => { console.error('Fetch error: ', error); }); ``` I noticed that while this is an improvement, I'm not catching all possible rejections effectively, especially if the network goes down or if the server returns a non-200 status code. My question is: how can I enhance this error handling to ensure that all potential issues are captured and logged? Would it be worthwhile to implement a centralized error handling mechanism, or should this be done on a case-by-case basis? Any best practices or examples would be greatly appreciated! Also, if anyone has insights on how to test these AJAX calls effectively in a React environment, that would be helpful too. This is part of a larger CLI tool I'm building. Is there a better approach? For context: I'm using Javascript on Windows. Any ideas what could be causing this? For reference, this is a production desktop app. Thanks for your help in advance! What's the correct way to implement this? Thanks in advance!