Question

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Help parsing ISO 8601 date in Javascript

I have a set of strings, all in similar form: 2012-05-31T00:00:00.0000000

All I want to pull from this is the year (2012), the month (05), and the day (31), then construct a javascript Date object from this data.

What is the best way to parse this data?

Answer 1

The easiest way I can think of is using a regular expression, and passing the values to the Date constructor:

function parseISODate(dateString) {
    var match = /^(\d{4})-(\d\d)-(\d\d)/.exec(dateString);
    return new Date(Number(match[1]), Number(match[2]) - 1, Number(match[3]));
}

console.log(parseISODate('2012-05-31T00:00:00.0000000'));
// Date {Thu May 31 2012 00:00:00 GMT+0200}

Of course, you could always expand this to match the time as well…