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webpackcreate-react-app

Invalid Host header when running Create React App on localhost subdomain

After updating to the react-scripts 1.0.0 I get this error when I try to open my app in the browser on a localhost subdomain: 'Invalid Host header'

My app was set up to serve different data for different subdomains: group1.localhost:3000 group2.localhost:3000 ...

I found that adding the code below to my webpack config should fix the problem.

devServer: {
  disableHostCheck: true
}

But how can i fix it in CRA without ejecting?

Solution

  • Please update to react-scripts@1.0.2.
    It fixes this issue for users who don't use the proxy feature in React.

    If you do use the proxy feature, please follow these instructions.