EasyType Coercion💻 Output Question

JavaScript Optional Chaining and Nullish Coalescing

💡

Hint

Consider how the code handles cases where properties are missing or null, and how the ?? operator provides a default value when the expression on its left is null or undefined.

What does this output?

let person = { name: 'John', address: { street: '123 Main St' } }
let unknownPerson = null
console.log(person.address?.street)
console.log(unknownPerson?.address?.street ?? 'Unknown')
console.log(person.phone ?? '(no phone)')

Correct Output

123 Main St
Unknown
(no phone)

JavaScript Optional Chaining and Nullish Coalescing

What does this output?

Correct Output

Why this output?

More Type Coercion Output Questions