Angular — case install error

npm install — legacy-peer-deps

npm uninstall ng2-smart-table

npm i ng2-smart-table@1.5.0 — save

npm i ng2-completer — save

ng serve — port 6100

ERROR in The Angular Compiler requires TypeScript >=3.4.0 and ❤.6.0 but 3.9.10 was found instead.

npm i -D typescript@3.4.5

https://stackoverflow.com/questions/57216110/the-angular-compiler-requires-typescript-3-4-0-and-3-5-0-but-3-5-3-was-found