upgrade all packages npm code example

Example 1: how to update my package.json

npm install -g npm-check-updates
/after install run following:
ncu -u

//Then this:
npm update

Example 2: update all dependencies with npm

npm i -g npm-check-updates
ncu -u
npm install

Example 3: npm update

npm update --save

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Use npm|yarn outdated to see which modules have newer versions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