Property ‘id’ does not exist on type ‘T’.(2339) Typescript Generics error

You need to provide a constraint for your generic type as follows: <T extends { id?: string }>

Update the line const updateArrayOfObjects = <T>(arrayOfObjects: T[], newObject: T, deleteObject: boolean = false): T[] => {

to const updateArrayOfObjects = <T extends { id?: string }>(arrayOfObjects: T[], newObject: T, deleteObject: boolean = false): T[] => {