javascript - 如何降低此 jquery 计数器动画的速度

Question

我有一个计数器，它会在达到特定百分比时进行动画处理。但是动画速度有点快，我想降低。

下面是我的代码。

HTML

<div class="progressbar" data-animate="false">
  <div class="circle" data-percent="90">
    <div></div>
  </div>
</div>

CSS:

.progressbar {
    display: inline-block;
    width: 100px;
    margin: 25px;
}
.circle {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    margin-top: 10px;
    display: inline-block;
    position: relative;
    text-align: center;
}
.circle:after {
    width: 120px;
    height: 120px;
    content: "";
    border: 2px solid #fb4f14;
    border-radius: 50%;
    display: block;
    position: absolute;
    top: 30px;
    left: 30px;
}
.circle canvas {
    vertical-align: middle;
    border: 2px solid #fb4f14;
    border-radius: 50%;
}
.circle div {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -20px 0 0 -86px;
    width: 100%;
    text-align: center;
    line-height: 40px;
    font-size: 31px;
}
.circle strong i {
    font-style: normal;
    font-size: 0.6em;
    font-weight: normal;
}
.circle span {
    display: block;
    color: white;
    margin-top: 12px;
}

JS:

$(document).ready(function ($) {
function animateElements() {
$('.progressbar').each(function () {
    var elementPos = $(this).offset().top;
    var topOfWindow = $(window).scrollTop();
    var percent = $(this).find('.circle').attr('data-percent');
    var percentage = parseInt(percent, 10) / parseInt(100, 10);
    var animate = $(this).data('animate');
    if (elementPos < topOfWindow + $(window).height() - 30 && !animate) {
        $(this).data('animate', true);
        $(this).find('.circle').circleProgress({
            startAngle: -Math.PI / 2,
            value: percent / 100,
            size: 180,
            thickness: 30,
            emptyFill: "rgba(0,0,0, .2)",
            fill: {
                color: '#fb4f14'
            }
        }).on('circle-animation-progress', function (event, progress, stepValue) {
            $(this).find('div').text((stepValue*100).toFixed(1) + "%");
        }).stop();
    }
});
}
animateElements();
$(window).scroll(animateElements);
});

部署:

JS Fiddle link

我尝试了下面的代码来降低我的 JS 文件的速度，但它没有用。

animateElements();
$(window).scroll(animateElements).animate(slow, 5000);

Answer 1

您可以将持续时间参数添加到 circleProgress:

circleProgress({
  startAngle: -Math.PI / 2,
  value: percent / 100,
  size: 180,
  thickness: 30,
  emptyFill: "rgba(0,0,0, .2)",
  fill: {
    color: '#fb4f14'
  },
  animation: {
    duration: 3000
  }
})