Snoupix

const appName = "AppName";

export type LocalStorage = {
    theme: "dark" | "light"
    items: Array<Item>
}

export type Item = {
    id: string
}

Snoupix

type User = {
    name: string
    age?: number
    birthday?: string
};

const prettyPrintWilder = (users: Array<User>): void => {
    users.map((user) => {
        console.log(
            user.age != undefined