Optional Chaining

Optional chaining reads through values that might be missing without throwing.

chaining.ts

type Profile = {
    name: string;
    contact?: {
        email: string;
    };
};

const hasContact: boolean = ;
const profile: Profile = hasContact
    ? { name: "Ada", contact: { email: "ada@example.com" } }
    : { name: "Ada" };

const email: string | undefined = profile.contact?.email;
const message: string = email === undefined ? "no email" : email;

console.log(message);

type Profile = {
    name: string;
    contact?: {
        email: string;
    };
};

const hasContact: boolean = ;
const profile: Profile = hasContact
    ? { name: "Ada", contact: { email: "ada@example.com" } }
    : { name: "Ada" };

const email: string | undefined = profile.contact?.email;
const message: string = email === undefined ? "no email" : email;

console.log(message);

optional chaining The `?.` operator stops and returns `undefined` when the value on the left is missing.