Date.prototype.toISOString()

{{JSRef}}

The toISOString() method of {{jsxref("Date")}} instances returns a string representing this date in the date time string format, a simplified format based on ISO 8601, which is always 24 or 27 characters long (YYYY-MM-DDTHH:mm:ss.sssZ or ±YYYYYY-MM-DDTHH:mm:ss.sssZ, respectively). The timezone is always UTC, as denoted by the suffix Z.

{{InteractiveExample("JavaScript Demo: Date.toISOString()")}}

const event = new Date("05 October 2011 14:48 UTC");
console.log(event.toString());
// Expected output: "Wed Oct 05 2011 16:48:00 GMT+0200 (CEST)"
// Note: your timezone may vary

console.log(event.toISOString());
// Expected output: "2011-10-05T14:48:00.000Z"

Syntax

toISOString()

Parameters

None.

Return value

A string representing the given date in the date time string format according to universal time. It’s the same format as the one required to be recognized by {{jsxref("Date.parse()")}} .

Exceptions

{{jsxref("RangeError")}}
- : Thrown if the date is invalid or if it corresponds to a year that cannot be represented in the date string format.

Examples

Using toISOString()

const d = new Date(0);

console.log(d.toISOString()); // "1970-01-01T00:00:00.000Z"

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

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