MediaWiki:Common.js

// 引入jQuery计时器插件[6](@ref)
mw.loader.load('//cdn.jsdelivr.net/npm/jquery-countdown@2.2.0/dist/jquery.countdown.min.js');
function startTimer(duration, display) {
    var timer = duration, days, hours, minutes, seconds;
    setInterval(function() {
        days = Math.floor(timer / (60 * 60 * 24));
        hours = Math.floor((timer % (60 * 60 * 24)) / (60 * 60));
        minutes = Math.floor((timer % (60 * 60)) / 60);
        seconds = Math.floor(timer % 60);

        display.textContent = days + "天 " + hours + ":" + minutes + ":" + seconds;
        if (--timer < 0) timer = duration;
    }, 1000);
}
// 初始化30天倒计时
window.onload = function() {
    var thirtyDays = 30 * 24 * 60 * 60,
        display = document.querySelector('#timer');
    startTimer(thirtyDays, display);
};