Typescript Patterns

.ts

/** String literal union from Enum */

enum Status {
  FAILED: 'fail',
  PENDING: 'pending,
  SUCCESS: 'success',
}

type StatusType = `${AccessPassVariant}`
// StatusType = 'fail' | 'pending' | 'success' 

----------------------

/** String literal union from Enum keys */

enum Status {
  FAILED: 'fail',
  PENDING: 'pending,
  SUCCESS: 'success',
}

type StatusKeyType = keyof typeof Status
// StatusKeyType = 'FAILED' | 'PENDING' | 'SUCCESS'

-----------------------

/** TS inference helper
 *  Wrap an interface in Prettify to give you all of the properites you expect by hovering.
 *  Use to debug really complicated inheritance based inference
 */
export type Prettify<T> = {
  [K in keyof T]: T[K]
} & {}