When looking at the code snippet below, I was under the impression that the destructured array variables, firstName and lastName, would be classified as string | undefined. This is because the array being destructured could have fewer variables compared to what is declared, causing any additional declared variables to default to undefined. However, in TypeScript, these variables are recognized only as type string. Can anyone shed some light on why this discrepancy exists? Many thanks.
const [firstName, lastName] = fullName.split(' ')
// Typescript produces these types:
// const firstName: string
// const lastName: string