npm upgrade all code example

Example 1: update npm

npm install -g npm@latest

Example 2: npm update all

npm update --save

Example 3: npm update to latest

npm i -g npm@latest

Example 4: update npm package

Use npm|yarn outdated to see which modules have newer versions
Use npm update|yarn upgrade (without a package name) to update all modules
Include --save-dev|--dev if you want to save the newer version numbers to your package.json. (NOTE: as of npm v5.0 this is only necessary for devDependencies).
Use npm install package@major-version to update to major version