Answers for "current version for react"

get react version

// To view which version of React is/was used for a particular app, type in the below in commandline/terminal.
npm view react version
npm view react-native version

react latest version

//Is used to update the version only; such as 16.0.0 can be update to latest 16.13.0 but.. 
//but.. 15.0.0 can't be updated to 16.13.0 or to 16.0.0 with this
npm update react

//Use this to go from 15.0.0 to 16.13.0
npm install --save react@latest