JS Practice — Built-in Objects

toISOString() — contains "T" separator

📖 Usage Example

const d = new Date('2024-01-15T00:00:00.000Z')
d.toISOString()  // → '2024-01-15T00:00:00.000Z'

Use toISOString() to serialize a Date as a UTC ISO 8601 string in the format YYYY-MM-DDTHH:mm:ss.sssZ.

Date.prototype.toISOString()

ISO 8601 strings use "T" to separate the date portion from the time portion.

Challenge: Verify that the output of toISOString() includes 'T'.

💡 Hints (1)