Typescript - getting tslint error on createReducer

Question

I created a simple reducer as part of ngRx, got the below error for the on() method.

also, got some errors in the reducer_creator.d.ts file:

Further, Here is my package.json ngrx and typescript versions:

"@ngrx/effects": "^11.0.1",
"@ngrx/store": "^11.0.1",
"@ngrx/store-devtools": "^11.0.1",
"typescript": "~3.1.6"

Any suggestions to fix this issue?

Answer 1

NgRx v11 expects TypeScript 4 to be used. https://ngrx.io/guide/migration/v11