How to run create-react-app build version

Question

I have created a test React application and I started it with the create-react-app. I am starting it with with yarn start, but that starts the debug version of the application. I did npm run build and it created the build folder, however when I do yarn start from the /build folder, it still starts the debug version of the application. I need this for testing performance with the optimized version. How can I solve this?

Answer 1

You can actually use static server to run build version of your app. It's doable with serve. You can test it with:

npm run build

npx serve -s build

Answer 2

Navigate inside the directory of your app first.

According to the official create-react-app website. When you run npm run build or yarn build you create a build directory with a production build of your app.

After running the command above the next thing you can do to check the build version of your app is to install serve to serve your static site on the port 5000 by default.

npm install -g serve
serve -s build

This will copy the link to your clipboard that you can paste in your browser and see the build version of your app.