How to check the installed version of React-Native

Question

To see what version you have on your Mac(Window also can run that code.), run react-native -v and you should get something like this:

If you want to know what version your project is running, look in /node_modules/react-native/package.json and look for the version key:

The best practice for checking the react native environment information.

react-native info

which will give the information

React Native Environment Info:
System:
  OS: Linux 4.15 Ubuntu 18.04.1 LTS (Bionic Beaver)
  CPU: (8) x64 Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
  Memory: 2.08 GB / 7.67 GB
  Shell: 4.4.19 - /bin/bash
Binaries:
  Node: 8.10.0 - /usr/bin/node
  Yarn: 1.12.3 - /usr/bin/yarn
  npm: 3.5.2 - /usr/bin/npm
npmPackages:
  react: 16.4.1 => 16.4.1 
  react-native: 0.56.0 => 0.56.0 
npmGlobalPackages:
  react-native-cli: 2.0.1
  react-native: 0.57.8

You can also open your package.json file in node_modules -> react-native.

The version is at the top:

 {
  "name": "react-native",
  "version": "0.12.0",
  ...
 }

Move to the root of your App then execute the following command,

react-native -v

In my case, it is something like below,

MacBook-Pro:~ admin$ cd projects/

MacBook-Pro:projects admin$ cd ReactNative/

MacBook-Pro:ReactNative admin$ cd src/

MacBook-Pro:src admin$ cd Apps/

MacBook-Pro:Apps admin$ cd CabBookingApp/

MacBook-Pro:CabBookingApp admin$ ls
MyComponents        __tests__       app.json        index.android.js    
ios         package.json
MyStyles        android         img         index.ios.js        
node_modules

Finally,

MacBook-Pro:CabBookingApp admin$ react-native -v
react-native-cli: 2.0.1
react-native: 0.44.0

If you want to see which version of react-native, react or another one you are running, open your terminal or cmd and run the desired command

npm view react-native version
0.63.4
npm view react version
17.0.1
npm view react-scripts version
4.0.1
npm view react-dom version
17.0.1

To see the local packages installed in your project including their versions and without their dependencies, run the below command from the project's root directory. In a React native app this would include the react-native package.

npm list --depth 0

Or if you installed them with yarn:

yarn list --depth=0

And to get just a specific package:

npm list react-native --depth 0
yarn list --pattern react-native --depth=0

this works for me

npm view react-native version

Output is: 0.63.4

npm view react version

17.0.1

npm view react-scripts version

4.0.1

npm view react-dom version

17.0.1`