我想在倒数计时器停止后打开一个 div

Question

我正在用计时器构建能力倾向测试。 我想在倒计时结束时显示一个超时的div。 以及是否可以在倒计时结束时显示**精益模态弹出窗口**框。 请帮忙!!.这是代码

爪哇语

<script language="JavaScript" type="text/javascript">
function CountDownTimer(duration, granularity) {
  this.duration = duration;
  this.granularity = granularity || 1000;
  this.tickFtns = [];
  this.running = false;
}
CountDownTimer.prototype.start = function() {
  if (this.running) {
    return;
  }
  this.running = true;
  var start = Date.now(),
      that = this,
      diff, obj;
  (function timer() {
    diff = that.duration - (((Date.now() - start) / 1000) | 0);
    if (diff > 0) {
      setTimeout(timer, that.granularity);
    } else {
      diff = 0;
      that.running = false;
    }
    obj = CountDownTimer.parse(diff);
    that.tickFtns.forEach(function(ftn) {
      ftn.call(this, obj.minutes, obj.seconds);
    }, that);
  }());
};
CountDownTimer.prototype.onTick = function(ftn) {
  if (typeof ftn === 'function') {
    this.tickFtns.push(ftn);
  }
  return this;
};
CountDownTimer.prototype.expired = function() {
  return !this.running;
};
CountDownTimer.parse = function(seconds) {
  return {
    'minutes': (seconds / 60) | 0,
    'seconds': (seconds % 60) | 0
  };
};

window.onload = function () {
    var display = document.querySelector('#time'),
        timer = new CountDownTimer(5),
        timeObj = CountDownTimer.parse(5);
    format(timeObj.minutes, timeObj.seconds);
    timer.onTick(format);
    document.querySelector('button').addEventListener('click', function () {
        timer.start();
    });
    function format(minutes, seconds) {
        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;
        display.textContent = minutes + ':' + seconds;
}
if(display.textContent == 0){

            document.querySelector("#div1").style.display="block";


}

};

</script>

目录

<button>Start Count Down</button>
    <div>Registration closes in <span id="time"></span> minutes!</div>

要显示的div

<div id="div1" style="display:none;" ><p>Hello</p></div>

Answer 1

好的，问题是，你有这段javascript代码：

    window.onload = function () {
    var display = document.querySelector('#time'),
        timer = new CountDownTimer(5),
        timeObj = CountDownTimer.parse(5);
    format(timeObj.minutes, timeObj.seconds);
    timer.onTick(format);
    document.querySelector('button').addEventListener('click', function () {
        timer.start();
    });
    function format(minutes, seconds) {
        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;
        display.textContent = minutes + ':' + seconds;
}
if(display.textContent == 0){

            document.querySelector("#div1").style.display="block";


}

在底部，你有一个"if"语句。

只需将该 if 语句移动到"格式"函数中，如下所示：

    window.onload = function () {
        var display = document.querySelector('#time'),
            timer = new CountDownTimer(5),
            timeObj = CountDownTimer.parse(5);
        format(timeObj.minutes, timeObj.seconds);
        timer.onTick(format);
        document.querySelector('button').addEventListener('click', function () {
            timer.start();
        });

 function format(minutes, seconds) {
        minutes = minutes < 10 ? "0" + minutes : minutes;
        seconds = seconds < 10 ? "0" + seconds : seconds;
        display.textContent = minutes + ':' + seconds;
        console.log(display.textContent);
        if(display.textContent == "00:00") {
            document.querySelector("#div1").style.display="block";
        }
    }
};

您的代码，就像它目前的方式一样，不会对每个报价都执行检查。

此外，您没有检查"0"。值应为"00：00"

当然，您可以将支票移动到tick事件中以显示div，但这完全取决于您。