The difference between dependencies and devDependencies in Node Package Manager

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When using NPM (Node Package Manager) you must see file package.json. In this file described information about package and you can see a list of all dependencies. Dependencies are divided into two types: dependencies and devDependencies. The difference between these two types is dependencies are packages that needed for production environment while devDependencies are packages which are only needed for local environment & test's. Dependencies (for runtime): Axios, Express, React, etc. DevDependencies (for local environment & tests): Babel, Webpack, ESLint, Jest, etc. To add dependencies to your project you need to do an npm install -save (shortcut: npm i -S) and if you want to add devDependencies you can run the following command: javascript npm install --save-dev (shortcut: javascript npm i -D).