In nodejs you at least get a warning along with the problematic behavior:
Welcome to Node.js v22.7.0.
Type ".help" for more information.
> setTimeout(() => console.log('reached'), 3.456e9)
Timeout { <contents elided> }
> (node:64799) TimeoutOverflowWarning: 3456000000 does not fit into a 32-bit signed integer.
Timeout duration was set to 1.
(Use `node --trace-warnings ...` to show where the warning was created)
reached
I'm surprised to see that setTimeout returns an object - I assume at one point it was an integer identifying the timer, the same way it is on the web. (I think I remember it being so at one point.)
It's return your differs between node and in a browser. If you want to type a variable to hold the return value in typescript and share that across node (eg jest tests where you might include @types/node) and the browser you need ReturnType<typeof setTimeout>, otherwise the code won't typecheck in all cases. Similar with setInterval.
