In this tutorial, we are going to learn about how to change the default port number in a create-react-app.
If we create a new project using create-react-app (CLI), by default the react app runs on port
To change the port number, first we need to install a new package called cross-env which helps to set environment variables across all platforms (like windows, mac, linux, etc).
npm install -D cross-env
Now, open your
package.json file and add the following line inside the
scripts object by specifying your port number.
"start": "cross-env PORT=4006 react-scripts start",
Here I set a
PORT environment variable to
4006 using cross-env, so that my react app runs on port