re act agent

### React Proxy Configuration and Usage In the context of developing applications using frameworks like React Native, configuring a proxy can be essential for enabling smooth development workflows especially when dealing with API calls during local development. While direct references to specific configurations are not provided in the given citations, understanding how proxies work within this ecosystem is crucial. For developers working on projects that require interaction between different layers such as C++ and JavaScript through JSI technology in React Native[^1], or those integrating backend services written in Go which might involve JWT setup functions for authentication purposes[^2], having an effective way to handle network requests becomes important. Similarly, for database interactions enabled via RESTful APIs from Oracle databases where SQL service has been activated[^3], ensuring these communications go smoothly often involves proper proxy settings. #### Setting Up Webpack Dev Server Proxy When running `create-react-app`, it comes pre-configured with Webpack dev server support out-of-the-box. To configure a simple HTTP proxy: ```javascript module.exports = { //... devServer: { proxy: { '/api': 'http://localhost:4000' } } }; ``` This configuration allows all `/api` prefixed URLs made by your frontend application to be proxied towards another server located at port 4000 locally. #### Environment Variables Method Another approach uses environment variables without modifying code directly. This method leverages `.env` files supported natively by Create React App: Create a file named `.env.development.local` inside project root directory containing lines similar to below: ``` REACT_APP_API_PROXY=http://localhost:4000/ ``` Then update Axios base URL accordingly: ```javascript import axios from 'axios'; const instance = axios.create({ baseURL: process.env.REACT_APP_API_PROXY, }); ``` Using either technique ensures seamless integration while avoiding CORS issues commonly encountered during development phases.