7 replies

Typescript array typing

Hey I was wondering why typescript doesn't indicate that the

name

name

here is possibly undefined when the arr is empty?

type T = { name: string }[];

const arr: T = [];

const name = arr[0].name; // no ts error but it throws Cannot read properties of undefined

type T = { name: string }[];

const arr: T = [];

const name = arr[0].name; // no ts error but it throws Cannot read properties of undefined

type T = { name: string }[];

const arr: T = [];

const name = arr[0].name; // no ts error but it throws Cannot read properties of undefined

type T = { name: string }[];

const arr: T = [];

const name = arr[0].name; // no ts error but it throws Cannot read properties of undefined