var dateControl = document.querySelector('input[type="datetime-local"]');
// Create date object from datetime string
var date = new Date(dateControl.value);
// Coverting local datetime back to UTC
console.log(date.toUTCString()); // Output "Tue, 26 Oct 2021 01:14:27 GMT"
// Coverting to local datetime
console.log(date.toString()); // Output "Tue Oct 26 2021 06:44:27 GMT+0530 (India Standard Time)"
// Coverting to local timezone
console.log(date.toLocaleString()); // Output "10/26/2021, 6:44:27 AM"
// Convert localtime using ISO
console.log(date.toISOString()); // Output "2017-06-01T03:00:00.000Z"
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