Just a followup point: for new TypeScript projects, strongly consider using the “strict” compiler flag. This flag enables strict null checks along with a number

Just a followup point: for new TypeScript projects, strongly consider using the “strict” compiler flag. This flag enables strict null checks along with a number of other useful checks / restrictions, such as disallowing variables without known types from being treated as “any”. These checks will catch bugs and improve your code but trying to enable them after the fact can be painful