JavaScript Optional Chaining

const name = person == null ? undefined : person.name

// Simpler syntax with JavaScript Optional Chaining
const name = person?.name;
const street = person?.address?.street;

Optional Chaining Functions:

const windowCount = house.getWindowCount && house.getWindowCount();

const windowCount = house.getWindowCount?.();

Optional Chaining Arrays:

const firstElement = arr && arr[0];

const firstElement = arr?.[0];

Optional Chaining Objects:

const name = person && person['name'];

const name = person?.['name'];