npm install Not Install changes of package.json

Introduction

I have added some modules in package.json, but when I run the npm install, it doesn’t install added modules.

Solution

Delete the package-lock.json, then run the npm install again

kliu$ npm install
up to date in 6.376s
kliu$ rm -rf package-lock.json
kliu$ npm install
npm notice created a lockfile as package-lock.json. You should commit this file.
added 26 packages in 9.651s