HintedNumber

See source on Github 

Prevent TypeScript from collapsing a union of number literals into number. Useful when union should be part of IntelliSense suggestions, but any number value is also accepted.

Example

type Union = '1' | '2'
 
type Unhinted = Union | number // number
type Hinted = HintedString<Union> // 1 | 2 | number