how to downgrade version of npm code example

Example 1: revert npm version

npm install -g [email protected]

Example 2: downgrade npm package to specific version

npm install -g npm@version-no

Example 3: npm downgrade package

npm view <package> versions // lets see what versions of package are available
npm install <package>@<version> // install desired version. Remember about flags which maybe you want to use (eg. -g for global)

// example for package 'express'
npm install [email protected]