package.json dependencies code example

Example 1: npm dev dependencies

# install as devDependency
npm install <package-name> --save-dev

# install as normal dependency
npm install <package-name> --save

# install all devDependencies listed in package.json
npm install --only=dev

# install all normal dependencies listed in package.json
npm install --only=prod
# or if NODE_ENV is set to production
npm install

Example 2: how to install dependencies from package.json

npm install // installs dependencies listed in package.json

Example 3: add dependencies to package.json

npm install <package-name> --save # Installs the package and add dependency in package.json
npm install # Installs dependencies listed in package.json

Example 4: what are dependencies in package.json

dependencies are the modules that the project relies on to function properly.

Example 5: package.json files property local

"scripts": {
  "postinstall": "node install.js"
},
"localDependencies": {
  "ui-elements": "file:path/to/ui-elements"
},
"dependencies": {
  "ui-elements": "git+https://[email protected]/user/ui-elements.git"
}