How to add dependency to package.json later

Question

In my application I have installed few node modules using below command

 npm install <modulename>

I forgot to mention "--save" to save the dependency list to package.json file.

Now I would like to update those dependencies in package.json file without updating the file manually . Any idea how it can be done ?

Answer 1

Just do: npm i name_of_package -S or the long version: npm install package_name --save

If you need to save it as a dev dependency, use the -D flag

Answer 2

You can run the same command again, specifying --save flag and it will be automatically included in package.json. The only problem is that the version of the package can be updated to newer version, so you may specify the specific version of your app: npm i --save [email protected].

Alternatively you can modify package.json yourself to include the dependency:

"dependencies": {
    "module": "*"
}