node.js – How do you reinstall an app’s dependencies using npm?

Is there a simple way to reinstall all packages that my app depends on (i.e. they are in my apps node_modules folder)?

The easiest way that I can see is delete node_modules folder and execute npm install.

The right way is to execute npm update. It’s a really powerful command, it updates the missing packages and also checks if a newer version of package already installed can be used.

Read Intro to NPM to understand what you can do with npm.

Most of the time I use the following command to achieve a complete reinstall of all the node modules (be sure you are in the project folder).

rm -rf node_modules && npm install

You can also run npm cache clean after removing the node_modules folder to be sure there aren’t any cached dependencies.

npm updated the CLI command for install and added the --force flag.

npm install --force

The --force (or -f) argument will force npm to fetch remote resources even if a local copy exists on disk.

See npm install

You can do this with one simple command:

npm ci

Documentation:

npm ci
Install a project with a clean slate

You can use the reinstall module found in npm.

After installing it, you can use the following command:

reinstall

The only difference with manually removing node_modules folder and making npm install is that this command automatically clear npm’s cache. So, you can get three steps in one command.

upd: npx reinstall is a way to run this command without globally installing package (only for npm5+)

Delete node_module and re-install again by command

rm -rf node_modules && npm i

For Windows you can use

(if exist node_modules rmdir node_modules /q /s) && npm install

which removes node_modules directory and performs npm install then. Removal before install assures that all packages are reinstalled.

npm ci

Alternatively, as of npm cli v6.5.0 you can use the backronym:

npm clean-install

https://github.com/npm/cli/releases/tag/v6.5.0 https://github.com/npm/cli/commit/fc1a8d185fc678cdf3784d9df9eef9094e0b2dec

Follow this step to re install node modules and update them

works even if node_modules folder does not exist. now execute the following command synchronously. you can also use “npm update” but I think this’d preferred way

npm outdated // not necessary to run this command, but this will show outdated dependencies

npm install -g npm-check-updates // to install the "ncu" package

ncu -u --packageFile=package.json // to update dependencies version in package.json...don't run this command if you don't need to update the version

npm install: will install dependencies in your package.json file.

if you’re okay with the version of your dependencies in your package.json file, no need to follow those steps just run

 npm install