JavaScript toISOString() Method

toISOString() Convert a date to a format that conforms to ISO 8601 Extended format string.

The time zone is always zero UTC offset, as shown by the suffix 'Z'.

Syntax:

date.toISOString()

Example

var d = new Date();
var str = d.toISOString();
document.getElementById('result').innerHTML = str;

The numbers in the table specify the first browser version that fully supports the toISOString() method:

Method
toISOString()	1	1	Yes	Yes	9

Return value:	According to universal time in ISO 8601Format string representing a given date
JavaScript Version:	ECMAScript 1