javascript - 多个 "clocks"的倒计时JavaScript

Question

我需要在一页上创建多个倒计时时钟。目前我只有一个，但我想让脚本变得漂亮和紧凑，所以我想对日期使用相同的计算，但只是提取不同的值。

英联邦运动会开始倒计时。我需要另一个倒计时闭幕式仪式。

脚本:

// set the date we're counting down to
var target_date_opening = new Date("Jul 23, 2014").getTime();
var target_date_closing = new Date("Aug 23, 2014").getTime();

// variables for time units
var days, hours, minutes, seconds;

// get tag element
var countdownOpening = document.getElementById("countdownOpening");
var countdownClosing = document.getElementById("countdownClosing");

// update the tag with id "countdownOpening" every 1 second
setInterval(function () {
    // find the amount of "seconds" between now and target
    var current_date = new Date().getTime();
    var seconds_left = (target_date_opening - current_date) / 1000;

    // do some time calculations
    days = parseInt(seconds_left / 86400);
    seconds_left = seconds_left % 86400;

    hours = parseInt(seconds_left / 3600);
    seconds_left = seconds_left % 3600;

    minutes = parseInt(seconds_left / 60);
    seconds = parseInt(seconds_left % 60);

    // format countdown string + set tag value
    countdownOpening.innerHTML = days + " days " + hours + " hours "
    + minutes + " minutes " + seconds + " seconds";  

}, 1000);

您可以看到我创建了新变量来区分目标日期 (target_date_ending)

我有 innerHTML 的 ID 作为 countdownClosing。

我的问题是让 setInterval 函数计算 target_date_ending 并输出 countdownClosing ，而无需再次复制脚本。

我不确定是否需要单独的变量来存储分钟、天、小时和秒变量。

Answer 1

尝试

// set the date we're counting down to
var target_date_opening = new Date("Jul 23, 2014").getTime();
var target_date_closing = new Date("Aug 23, 2014").getTime();

// variables for time units
var days, hours, minutes, seconds;

// get tag element
var countdownOpening = document.getElementById("countdownOpening");
var countdownClosing = document.getElementById("countdownClosing");

// update the tag with id "countdownOpening" every 1 second
setInterval(function () {
    print(countdownOpening, target_date_opening)
    print(countdownClosing, target_date_closing)
}, 1000);

function print(el, time) {
    // find the amount of "seconds" between now and target
    var current_date = new Date().getTime();
    var seconds_left = (time - current_date) / 1000;

    // do some time calculations
    var days = parseInt(seconds_left / 86400);
    seconds_left = seconds_left % 86400;

    var hours = parseInt(seconds_left / 3600);
    seconds_left = seconds_left % 3600;

    var minutes = parseInt(seconds_left / 60);
    var seconds = parseInt(seconds_left % 60);

    // format countdown string + set tag value
    el.innerHTML = days + " days " + hours + " hours " + minutes + " minutes " + seconds + " seconds";
}

演示:Fiddle