1页上有多个javascript计时器

Question

我希望你们可以帮助我，因为我对javascripts知之甚少。 我一直在使用相同的计时器，它总是像魅力一样。虽然当我试图在我的页面上再次添加相同的计时器时，只有1个可以工作。

function startTimer(duration, display) {
    var timer = duration, minutes, seconds;
    setInterval(function () {
        minutes = parseInt(timer / 60, 10)
        seconds = parseInt(timer % 60, 10);

        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;

        display.textContent = minutes + ":" + seconds;

        if (--timer < 0) {
            timer = duration;
        }
    }, 1000);
}

window.onload = function () {
    var fiveMinutes = 60 * 10.1,
        display = document.querySelector('.time');
    startTimer(fiveMinutes, display);
};

<span class="time">10:07</span>

<br/>
<br/>
<br/>

<span class="time">10:07</span>

我已经尝试为另一个类添加第二个脚本，但遗憾的是没有工作结果......

有人能帮帮我吗？因为我对javascript知之甚少，所以JSfiddle首选！提前谢谢！

Answer 1

使用querySelectorAll

function startTimer(duration, displays) {
    var timer = duration, minutes, seconds;
    setInterval(function () {
        minutes = parseInt(timer / 60, 10)
        seconds = parseInt(timer % 60, 10);

        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;

        Array.prototype.forEach.call(displays, function(display) {
            display.textContent = minutes + ":" + seconds;
        });

        if (--timer < 0) {
            timer = duration;
        }
    }, 1000);
}

window.onload = function () {
    var fiveMinutes = 60 * 10.1,
        displays = document.querySelectorAll('.time');
    startTimer(fiveMinutes, displays);
};

<span class="time">10:07</span>

<br/>
<br/>
<br/>

<span class="time">10:07</span>

Answer 2

function startTimer(duration, display, display2) {
    var timer = duration, minutes, seconds;
    setInterval(function () {
        minutes = parseInt(timer / 60, 10)
        seconds = parseInt(timer % 60, 10);

        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;

        display.textContent = minutes + ":" + seconds;
        display2.textContent = display.textContent;
        if (--timer < 0) {
            timer = duration;
        }
    }, 1000);
}




 window.onload = function () {
    var fiveMinutes = 60 * 10.1,
        display = document.querySelector('.time');
        display2 = document.querySelector('.time2');
    startTimer(fiveMinutes, display ,display2);
};