JSFiddle - React, Tailwind, and code Playground

by Arnaud Buchholz

TypeScript

type OptionalMember {
  member?: string;
}

type UndefinedMember {
  member: string | undefined;
}

const undefinedValue = undefined;

const o1: OptionalMember = {
  member: undefinedValue;
};

const u1: UndefinedMember = {
  member: undefinedValue;
};