How to disable automatic casting of number to enum?

Question

typescript

I am writing a node.js application using TS. I noticed that I can assign a number to a variable of enum type, although it should require an explicit cast. What compiler option is responsible for this?

Answer 1

No, it's By Design.
https://github.com/Microsoft/TypeScript/issues/6131

It's to allow patterns such as n = n + 1.