Error "timeout.close is not a function" when try to clear interval - angular(5)

It's because of your IDE! Make sure your IDE didn't include automatic imports such as

import { clearInterval } from 'timers'; 

If so, remove them. Rest should be fine.

Had the same problem with clearTimeout.

using window.clearTimeout instead of clearTimeout works too in case you need the import { clearTimeout } from "timers"; or import { clearInterval } from 'timers'; imports.