CRA: changing ports

[aishp9]

Are there any references that explain how CRA opens up in a different port if the previous port is in use?

[malcolm-kee]

You can read up the source code.

The part to choose port is here:

create-react-app/packages/react-dev-utils/WebpackDevServerUtils.js

Line 448 in 0ee4765

function choosePort(host, defaultPort) {