bday_calculator/script.js at main · code-with-srj/bday_calculator · GitHub

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function calcOfDays() {

    var one_day = 1000 * 60 * 60 * 24
    var input = document.getElementById('date').value;
    var flag = 0;
    if (input === "")
        document.getElementById("result").innerHTML = "Try again."
    else {
        var present_date = new Date();

        var b_day = new Date(input);
        b_day.setHours(0, 0);
        b_day.setFullYear(present_date.getFullYear());

        if (present_date.getMonth() > b_day.getMonth())
            b_day.setFullYear(b_day.getFullYear() + 1)
        else if (present_date.getMonth() === b_day.getMonth()) {
            if (present_date.getDate() > b_day.getDate())
                b_day.setFullYear(b_day.getFullYear() + 1)
            else if (present_date.getDate() === b_day.getDate())
                flag = 1;
        }

        var days = Math.round(b_day.getTime() - present_date.getTime()) / (one_day);
        var hours = ((days - (Math.floor(days))) * 24);
        var min = ((hours - (Math.floor(hours))) * 60);
        var sec = ((min - (Math.floor(min))) * 60);

        if (flag === 1) {
            confetti();
            document.getElementById("result").innerHTML = "It's your B'Day !!"
        } else {
            document.getElementById("result").innerHTML = Math.floor(days) + " days " + Math.floor(hours) + " hrs " + Math.floor(min) + " min " + Math.floor(sec) + " sec";
            setTimeout(calcOfDays, 1000);
        }

    }
}