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

## The Question :

419 people think this question is useful

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

• npm rebuild might also help some issues with native dependencies
• In case it helps others: If you’re just trying to reinstall one package, npm update <packageName> works great

674 people think this answer is useful

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

104 people think this answer is useful

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.

75 people think this answer is useful

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 &amp;&amp; npm install



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

60 people think this answer is useful

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.

34 people think this answer is useful

You can do this with one simple command:

npm ci



Documentation:

npm ci
Install a project with a clean slate

14 people think this answer is useful

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+)

2 people think this answer is useful

Delete node_module and re-install again by command

rm -rf node_modules &amp;&amp; npm i



1 people think this answer is useful

For Windows you can use

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



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

1 people think this answer is useful
npm ci



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

npm clean-install


Sources:

0 people think this answer is useful

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


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