/** uses a fallback when a value is not set on an object */functionnotSetFallback<T,Kextendsstring,// eslint-disable-next-line @typescript-eslint/no-unnecessary-type-parameters -- removing this changes the return typeOextends(Partial<Record<K,T>>&Record<string,unknown>)|undefined>(obj:O,key:K,fallback:T):T|undefined{returnobj&&keyinobj ?obj[key] :fallback;}functionnotSetFallbackWithoutObjectType<T,Kextendsstring>(obj:(Partial<Record<K,T>>&Record<string,unknown>)|undefined,key:K,fallback:T):T|undefined{returnobj&&keyinobj ?obj[key] :fallback;}functiontester(fallbackString:string){notSetFallback({a:true,b:"hi"},"b",fallbackString);// oknotSetFallbackWithoutObjectType({a:true,b:"hi"},"b",fallbackString);// errorconstobj={a:true,b:"hi"}asPartial<{a:boolean,b:string}>conststringValue1:string|undefined=notSetFallback(obj,"b",fallbackString);// okconststringValue2:string|undefined=notSetFallbackWithoutObjectType(obj,"b",fallbackString);// error (return value typed "string | boolean | undefined")}

module.exports={parser:"@typescript-eslint/parser",rules:{"@typescript-eslint/no-unnecessary-type-parameters":"error",},};

{"compilerOptions": {"strictNullChecks":true  }}