React app error: Failed to construct ‘WebSocket’: An insecure WebSocket connection may not be initiated from a page loaded over HTTPS

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For folks waiting for react-scripts for a patch:

For local testing over https, you can manually edit

node_modules/react-dev-utils/webpackHotDevClient.js

Here’s the code you’ll want at line 62 of that file:

protocol: window.location.protocol === 'https:' ? 'wss' : 'ws',

For deployment follow below steps:

npm install -g serve // This can be done locally too

npm run build

And Then in your package.json add a deploy script to work with serve:

"scripts": {
    "deploy": "serve -s build",
}

And then

npm deploy or yarn deploy

Hope this answer helps you get rid of the error.

For more info refer to here`

This bug has been fixed in the latest version of the release.
Click here to see the source file

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