Create React App adding CORS header

Question

I'm trying to figure out where to add the "Access-Control-Allow-Origin" header to my create-react-app dev Server config.

So far I'm adding it to config/webpackDevServer.config.js without much luck.

Any idea on where I could add it?

thanks!

Answer 1

Here is a recipe based on @tlfu 's answer for those that are using react-app-rewired. In this case you'll need to define a root level config-overrides.js file containing the following:

module.exports = {
  // Extend/override the dev server configuration used by CRA
  // See: https://github.com/timarney/react-app-rewired#extended-configuration-options
  devServer: function(configFunction) {
    return function(proxy, allowedHost) {
      // Create the default config by calling configFunction with the proxy/allowedHost parameters
      // Default config: https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/config/webpackDevServer.config.js
      const config = configFunction(proxy, allowedHost);

      // Set loose allow origin header to prevent CORS issues
      config.headers = {'Access-Control-Allow-Origin': '*'}

      return config;
    };
  },
};