ecmascript-temporal – Tarik Billa

javascript to find leap year

April 7, 2024 by Tarik

It’s safer to use Date objects for datetime stuff, e.g. isLeap = new Date(year, 1, 29).getMonth() == 1 Since people keep asking about how exactly this works, it has to do with how JS calculates the date value from year-month-day (details here). Basically, it first calculates the first of the month and then adds N … Read more

How to ISO 8601 format a Date with Timezone Offset in JavaScript?

October 25, 2022 by Tarik

Here’s a simple helper function that will format JS dates for you. function toIsoString(date) { var tzo = -date.getTimezoneOffset(), dif = tzo >= 0 ? ‘+’ : ‘-‘, pad = function(num) { return (num < 10 ? ‘0’ : ”) + num; }; return date.getFullYear() + ‘-‘ + pad(date.getMonth() + 1) + ‘-‘ + pad(date.getDate()) … Read more