Service Worker registration error: Unsupported MIME type ('text/html')

Question

I\'m using create-react-app with an express server.

create-react-app has a pre-configured ServiceWorker that caches local assets (https://github.com/fac

Answer 1

The script has an unsupported MIME type ('text/html'). Failed to load resource: net::ERR_INSECURE_RESPONSE (index):1 Uncaught (in promise) DOMException: Failed to register a ServiceWorker: The script has an unsupported MIME type ('text/html').

Code for template.js root file

export default ({ markup, css }) => {
  return `
      
        
          
          
          
          
          

          
          
        
        
            
${markup}
          
          
          
        
      `;
};