Unexpected CORS guide with AJAX requests in React app using Fetch API
Does anyone know how to I've spent hours debugging this and I'm working with a frustrating scenario with my React application where I'm making AJAX calls using the Fetch API. The backend is set up to allow CORS, but I'm still getting a CORS behavior when I try to fetch data. The behavior message in the console reads: `Access to fetch at 'https://api.example.com/data' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.` I've confirmed that my server is configured to send the `Access-Control-Allow-Origin` header correctly. Here's how I set up my fetch request: ```javascript fetch('https://api.example.com/data', { method: 'GET', headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' } }) .then(response => { if (!response.ok) { throw new behavior('Network response was not ok'); } return response.json(); }) .then(data => console.log(data)) .catch(behavior => console.behavior('There has been a question with your fetch operation:', behavior)); ``` I've made sure that the backend is running and can be accessed directly in the browser, but for some reason, the request from my React app gives this CORS behavior only in development mode. When I deploy the application and test it, the requests work as expected. I've also tried adding a proxy in my `package.json`: ```json "proxy": "http://api.example.com" ``` This didn't help either. What could be causing this scenario? Is there something specific I need to consider when developing locally with CORS and the Fetch API? Any insights would be greatly appreciated! This is my first time working with Javascript 3.10. Thanks for any help you can provide! This is my first time working with Javascript LTS. Has anyone else encountered this?