typescript type from array code example

Example 1: typescript array

let list: number[] = [1, 2, 3];

Example 2: array in typescript

const count = [...Array(5)];
count.map((_) => console.log('hi'));

Example 3: create type as values of list typescript

// You can create your list as enums
enum statuses {
  SETUP,
  STARTED,
  FINISHED
}

// Creates known string type
// 'SETUP' | 'STARTED' | 'FINISHED'
type StatusString = keyof typeof statuses

// JobStatus.status must match 'SETUP' | 'STARTED' | 'FINISHED'
export type JobStatus = {
  status: StatusString
}