JS Practice — Built-in Objects

setMonth() — returns a timestamp

📖 Usage Example

const d = new Date(2024, 0, 15)
d.setMonth(5)
d.getMonth()  // → 5 (June)

Use setMonth() to mutate the month (0-indexed) of a Date object in place and get back the updated timestamp.

Date.prototype.setMonth()

setMonth() returns the new timestamp as a number.

Challenge: Verify that typeof d.setMonth(5) returns 'number'.

💡 Hints (1)