ts interface array code example

Example 1: typescript interface

interface NumberOrStringDictionary {
  [index: string]: number | string;
  length: number; // ok, length is a number
  name: string; // ok, name is a string
}Try

Example 2: create method in interface for set TS

running: someTask, arg: test

Example 3: interface ts one valu

// use type instead interface
type StringOrNull = string | null;