React - how to check react-router version?

Every package version is stored in the package.json file.

Simple steps:

1. go to /path/to/my-app/package.json,
2. search for react-router.

You can also run npm command in the project directory: 

npm list --depth=0

The above command will return a list of locally installed packages (without displaying their dependencies).

You need to find react-router package on the list, e.g. react-router@4.1.0.

Uder Bash you can run the command in the project directory:

npm list --depth=0 | grep preact-router | cut -d @ -f 2

Example output:

4.1.0