Answers for "upgrade angular version"

downgrade angular version in project

Try like this :

ng --version
npm uninstall -g @angular/cli
npm cache clean --force

npm install -g @angular/[email protected]
ng --version

update angular cli

npm uninstall -g @angular-cli
npm install -g @angular/cli@latest

how to update angular version

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      ng update @angular/cli @angular/core

angular 8 to 9

First, update to the latest version of 8
ng update @angular/cli@8 @angular/core@8

Then, update to 9
ng update @angular/cli @angular/core

update angular

npm uninstall -g @angular-cli
npm install -g @angular/cli@latest

update angular to specific version

ng update @angular/[email protected] @angular/[email protected]