Should dependencies be deleted from disk automatically after install/update with Composer?

Question

After removing a dependency from composer.json and running install or update, should I expect the files to be removed automatically from disk?

I had to remove them manually, not sure if I am supposed to.

Answer 1

Running a composer update will remove packages you removed from your composer.json.

Since install uses composer.lock instead of composer.json it will not remove packages removed from your composer.json. However, you should get a message that your lock file is out of sync with your composer.json and you should run an update.