ng upgrade command fails for upgrading cli from v7 to v8

Question

The ng upgrade command for updating cli version from a v7 project to v8 fails.

Manually trying to upgrade cli first also fails.

ng update @angular/cli

Your global Angular CLI version (8.0.1) is greater than your local version (7.3.9). The local Angular CLI version is used.

Package "@angular/compiler-cli" has an incompatible peer dependency to "typescript" (requires ">=3.1.1 <3.3", would install "3.4.5"). Incompatible peer dependencies found. See above.

Alabama

Answer 1

try upgrading all packages using ng update --all --force if this doesn't work then try upgrading core and CLI ng update @angular/core @angular/cli.

and still not working then install typescript manually using npm i [email protected]

Grory

Your solution is should solve the OP's issues, though I would disagree on installing the latest version of typescript, as the Angular CLI/transpiler/compiler only supports up to a specific TypeScript version – Backbend

totally agree with you @wentjun, updated the answer and thanks for pointing out. – Grory

Unknown argument all – Fail

Answer 2

Like answer above, force the update, but in my case typescript@latest doesn't work because angular requires [email protected]. If you force all it install 3.5 version and you must downgraded it

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