Question

我是网络开发的新手，我想跟踪员工的工作。因此，每当新任务分配给员工时，经理必须添加他的名字和给定时间。添加时间后，它将从给定时间开始倒计时。并且它将在0上变为红色。我已经看到很多例子但是无法实现它。我必须在javascript的下拉列表中添加项目，但我无法调用它。我必须在列表中添加多名员工。

Answer 1

使用bootstrap或J查询日期时间选择器，并将该日期提供给以下java脚本。

<p id="timer"></p>

$(document).ready(function () {
    // Set the date we're counting down to
    var countDownDate = new Date("May 30, 2018 15:16:25").getTime();

    // Update the count down every 1 second
    var x = setInterval(function () {

        // Get todays date and time
        var now = new Date().getTime();

        // Find the distance between now an the count down date
        var distance = countDownDate - now;

        // Time calculations for days, hours, minutes and seconds
        var days = Math.floor(distance / (1000 * 60 * 60 * 24));
        var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 
        60 * 60));
        var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 
        60));
        var seconds = Math.floor((distance % (1000 * 60)) / 1000);

        // Display the result in the element with id="demo"
        document.getElementById("timer").innerHTML = days + "d " + hours + 
        "h "
        + minutes + "m " + seconds + "s ";

        // If the count down is finished, write some text 
        if (distance < 0) {
            clearInterval(x);
            document.getElementById("timer").innerHTML = "EXPIRED";
        }
    }, 1000);
});

如何使用用户输入

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