React-Scripts starts not accepting js changes

Question

I have a React app bootstrapped using create-react-app. The application runs in a docker container and has been deployed in a subdomain. Let's say the domain name is http://mycompany.com , then my React app is at http://mycompany.com/users/userid/apps/reactapp .

There is a reverse proxy server that can do URL rewriting, changing the base URL to a subdomain URL. This is what my package.json looks like -

{
  "name": "my-app",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@material-ui/core": "^4.12.4",
    "@testing-library/jest-dom": "^5.16.1",
    "@testing-library/react": "^12.1.2",
    "@testing-library/user-event": "^13.5.0",
    "@types/classnames": "^2.3.1",
    "@types/jest": "^27.0.3",
    "@types/node": "^16.11.47",
    "@types/react": "^17.0.38",
    "@types/react-dom": "^17.0.11",
    "@types/react-icons": "^3.0.0",
    "@types/react-router-dom": "^5.3.2",
    "@types/sass": "^1.43.1",
    "bootstrap": "^5.1.3",
    "classnames": "^2.3.1",
    "font-awesome": "^4.7.0",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-icons": "^4.3.1",
    "react-router-dom": "^6.3.0",
    "react-scripts": "5.0.0",
    "register-service-worker": "^1.7.2",
    "typescript": "^4.5.4",
    "web-vitals": "^2.1.2"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "css-flatten": "^1.0.1",
    "react-hot-loader": "^4.13.1",
    "react-select": "^5.4.0",
    "sass": "^1.45.2"
  }
}

The problem I am facing is that any JS file changes are not reflected even after I restart the development server using react-scripts start. This is only reflected when I restart the docker container. In the browser, I checked, and the bundle.js file doesn't have the latest changes. I've tried these things -

1. Delete node_modules/.cache, node_modeules
2. Use CHOKIDAR_USEPOLLING=true in react-scripts startup

I can see in the development server logs that file changes are being detected, but these changes are not being served to the browser. Even if I delete a file (so I can see the error log in the development server log), nothing changes in the application even if the browser refreshes.

Answer 1

You may need to add the following to the server side response headers

"headers": { 
    "/**": { 
        "Cache-Control": "no-store, no-cache" 
    } 
}

If the problem persists, you can try clearing the browser cache

Related questions:

1. Cache clearing using CRA React
2. ReactJS: How to prevent browsers from caching static files?