heroku build error: Treating warning as errors

Question

Build error: Treating warnings as errors because process.env.CI = true. Most CI servers set it automatically.

My OS: Windows 10

Answer 1

The error msg is self explanatory. Here is how I fixed it:

If you are using Windows OS, then first install the cross-env as a dev dependency.(https://github.com/kentcdodds/cross-env).

Then update your build command in package.json as follows:

Ex: For a project using Create React App; "build": "cross-env CI=false react-scripts build"

Done!