如何在 package.json 中更改包的版本

Question

If I uninstall a package from my project like this:

npm uninstall react     

the line related to this package in package.json file does not disappear, and then when I install a different version of this package, like this:

npm install react@15.0.0

the package gets installed to the node_modules, but the version in package.json remains to be unupdated, meaning that it is still the old version of a package, that I had before the uninstallation.

How to delete / update / change the version in package.json through terminal?

Answer 1

You need to add --save to the command in both install and uninstall cases.

This way, when uninstalling with --save, the package's line will be erased from package.json as well as from node_modules. And when installing with --save, the package's line will be added to the package.json, as well as the node_modules.

So, you should go like that, for example:

npm uninstall react --save    
npm install react@15.0.0 --save