How to clone and run an old ionic 3 app?

You can run ionic 3 app with ionic 3 or ionic 4 CLI. ionic 3 app do not run with ionic 5 CLI
At first check ionic version: ionic --version
If the ionic version is not 3 or 4 (in my pc, ionic version is 5.4.9), install ionic version 4
  • Uninstall ionic globally: sudo npm uninstall -g ionic
  • Install ionic globally: sudo npm install -g [email protected]
Delete node_modules directory, and package-lock.json file:
  • rm -rf node_modules package-lock.json
Install npm packages
  • npm install
now ionic serve should work
  • ionic serve -O
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