Table of Contents

About

A dev dependency is a build and test dependency.

They

  • are not needed in the dependency graph (bundler, test harnesses or transpilers)
  • will not be downloaded when an other package uses your package as a dependency.

Management

Add

This command will modify the devependency properties of package.json 

cd DirectoryOfPackage.Json
# then
yarn add [package] --dev
# or
npm install packageName --save-dev