How to keep both the ionic 3 and ionic 4 version together in my machine

Issue

I am working with ionic 3 version with many apps and it's working fine. Now for my new project, I want to develop in ionic 4 but don't want to uninstall ionic 3. So when I run below command to install ionic 4 locally it throws an error.

Command:

npm install ionic@rc cordova

Error:

npm ERR! code ETARGET
npm ERR! notarget No matching version found for ionic@rc
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.
npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/username/.npm/_logs/2019-03-04T09_28_35_725Z-debug.log

How to resolve this issue?

Solution

You don't need to have different versions. You only install the global CLI. The CLI works with all versions of the framework.

eg https://github.com/ionic-team/starters

run

ionic start myApp tabs --type ionic1  // for ionic 1    
ionic start myApp tabs --type ionic-angular // for ionic 2/3    
ionic start myApp tabs --type angular  // for ionic 4+

Answered By - itdoesntwork