--save-dev is a command-line option used to install packages needed during the project's development phase. When you pass --save-dev to the npm install package-name command, it downloads all the package files to the node_modules folder and makes an entry of that package to the devDependencies section of the package.json file.
Full Answer
How do I install NPM?
Install Node.js, npm, and VS Code
- Prerequisites. ...
- Three approaches to installing Node.js and npm. ...
- Choosing a Node.js release. ...
- Download the installation package from the Node.js project website. ...
- Use Homebrew to install Node.js on MacOS. ...
- Use nvm to install Node.js on MacOS and Linux only. ...
- Get the source code from GitHub. ...
- Install VS Code. ...
- Conclusion. ...
How to install NPM?
- From the standard Ubuntu repositories. This is the easiest way to install Node.js and npm on Ubuntu and should be sufficient for most use cases. ...
- From the NodeSource repository. Use this repository if you want to install a different Node.js version than the one provided in the Ubuntu repositories. ...
- Using nvm (Node Version Manager). ...
How do I update devdependencies in NPM?
Wrap up
- Use npm outdated to discover dependencies that are out of date
- Use npm update to perform safe dependency upgrades
- Use npm install <packagename>@latest to upgrade to the latest major version of a package
- Use npx npm-check-updates -u and npm install to upgrade all dependencies to their latest major versions
How to update NPM?
- Run Command Prompt as Administrator
- Navigate to the folder containing nodejs (eg. C:\Program Files\nodejs)
- Run Powershell -ExecutionPolicy Unrestricted
- Run npm-windows-upgrade
- This will show list of versions available to install. Just select your desired version by moving up/down key & Press Enter. This'll update your npm
- To check the current version of npm Run npm --version
What is -- save dev in npm?
npm install [package-name] –save-dev: When –save-dev is used with npm install, it signifies that the package is a development dependency. A development dependency is any package that absence will not affect the work of the application.
What is the use of -- save dev?
--save-dev saves the name and version of the package being installed in the dev-dependency object. As developers who are just getting started or want to build an application that can be easily deployed without any problem this difference is a must know.
Is -- save dev necessary?
There is no noticable difference between --save and --save-dev when developing. To take the moment. js example: when running webpack, the moment code is taken from node_modules and included in the project. In this sense there is no difference with typescript which is also needed when running webpack.
What is -- dev in npm install?
Use --only=dev When your NODE_ENV is set to production, you need to use the below command to install devDependencies for your project. npm install --only=dev. The element 'only' will ensure that only the devDependencies get installed irrespective of the NODE_ENV.
Why we use -- save with npm?
–save or -S: When the following command is used with npm install this will save all your installed core packages into the dependency section in the package. json file. Core dependencies are those packages without which your application will not give desired results.
Why we use -- save in npm install?
--save. NPM provides the --save option while installing the packages. If we use the --save option after installing the package, it will be saved in package. json inside dependencies.
Do you still need -- save for npm?
As of npm 5.0. 0, installed modules are added as a dependency by default, so the --save option is no longer needed.
What is NPX vs npm?
NPM is a package manager used to install, delete, and update Javascript packages on your machine. NPX is a package executer, and it is used to execute javascript packages directly, without installing them.
What is difference between dependencies and devDependencies?
"dependencies" : Packages required by your application in production. "devDependencies" : Packages that are only needed for local development and testing.
What is a dev dependency?
Development dependencies are intended as development-only packages, that are unneeded in production. For example testing packages, webpack or Babel. When you go in production, if you type npm install and the folder contains a package. json file, they are installed, as npm assumes this is a development deploy.
How do I remove dev dependency?
To remove a dev dependency, you need to attach the -D or --save-dev flag to the npm uninstall, and then specify the name of the package. You must run the command in the directory (folder) where the dependency is located.
How npm install all dependencies?
It's simple. If you want to install all the node_modules from the package. json file you simply put: npm install in terminal (on the same directory where the package. json exists) and it would install all the node modules in the folder called node_modules .
What is save on a computer?
Save is writing data to a storage medium, such as a floppy disk, CD-R, USB flash drive, or hard drive. The save option is found in almost all programs commonly under the "File" drop-down menu or through an icon that resembles a floppy diskette. When clicking the Save option, the file is saved as its previous name.
What is Save and Save As in computer?
Save allows us to update the last saved version so that it will match with the current working version and that last saved work will be updated with the new work. Save As allows us to save our work for the first time and also it will ask for in what name it will be saved and where it will be saved.
What is the difference between save and save us?
What is the Difference Between Save and Save As? The key difference between Save and Save As is that Save allows you to update a previously saved file with new content, whereas Save As allows you to save a new file or an existing file to a new place with the same or different name.
Are Save and Save As same in MS Word?
The main difference between Save and Save As is that Save helps to update the lastly preserved file with the latest content while Save As helps to store a new file or to store an existing file to a new location with the same name or a different name.
What does "save-dev" mean in npm?
npm install [package-name] –save-dev: When –save-dev is used with npm install, it signifies that the package is a development dependency. A development dependency is any package that absence will not affect the work of the application. In package.json file under the devDependencies section contains the list of all development dependencies. When someone installs your package they will not install any development dependencies but if they clone the repository, then they will install all the development dependencies too. Example: nodemon
What is NPM in JavaScript?
NPM (Node Project Manager) is a package manager used by JavaScript runtime environment Node.js. It has two very frequently used commands to downloaded different dependencies, npm install --save [package-name] and npm install --save-dev [package-name]. Both commands will lead to download and installation of packages from NPM servers but they have a bit different ways.
Is package installed a core or development dependency?
The package installed is not a core rather development dependency. All core dependency is listed under dependencies in package.json. All development dependency is listed under devDependencies in package.json. It will be installed if a third person tries to install or clone your package.
