From Command Line: Do it something like this: 1~$ npm view react version And you get the version directly: 1~$ npm view react version 218.0.0 Other means, see https://stackoverflow.com/questions/36994564/how-can-one-tell-the-version-of-react-running-at-runtime-in-the-browser

1PS /Users/example> $PSVersionTable 23Name Value 4---- ----- 5PSVersion 7.0.2 6PSEdition Core 7GitCommitId 7.0.2 8OS Darwin 19.5.0 Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64 9Platform Unix 10PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…} 11PSRemotingProtocolVersion …