如何使用 HTML、CSS 和 JavaScript 根据提供的百分比值动态更改时间线进度条的颜色？

Question

我目前正在制定代表进度的时间线，并且我有一组具有相应百分比值的数据点。时间线使用 HTML 和 CSS 设计样式，并使用 :before 伪元素作为进度条。每个数据点都由 .timeline-item 元素表示。

我想根据数据中提供的值动态填充这个进度条的颜色。

我正在寻找有关如何根据数据中提供的百分比值动态更改时间线中进度条颜色的指导。实现这一目标的最佳方法是什么？

代码片段

const timelineData = [
  {percentage: '0%', date: '1-1-2020', title: 'Mussum ipsum cacilds 1', content: 'Content 1' },
  {percentage: '20%', date: '2-1-2020', title: 'Mussum ipsum cacilds 2', content: 'Content 2' },
  {percentage: '40%', date: '3-1-2020', title: 'Mussum ipsum cacilds 3', content: 'Content 3' },
  {percentage: '60%', date: '4-1-2020', title: 'Mussum ipsum cacilds 4', content: 'Content 4' },
  {percentage: '80%', date: '5-1-2020', title: 'Mussum ipsum cacilds 5', content: 'Content 5' },
    ];

  function generateTimelineItems() {
  const timelineContainer = document.getElementById('custom-timeline');

  timelineData.forEach(item => {
  const listItem = document.createElement('li');
  listItem.className = 'timeline-item';

  //  Convert percentage to a numeric value
  const percentage = parseInt(item.percentage, 10);

  listItem.style.width = `${percentage}%`;

  const progressBar = document.createElement('div');
  progressBar.className = 'progress-bar';
  progressBar.style.width = `${percentage}%`;

  const panel = document.createElement('div');
  panel.className = 'timeline-panel';
  panel.innerHTML = `
                <div class="timeline-heading">
                    <p><small class="text-muted"><i class="glyphicon glyphicon-time"></i> ${item.date}</small></p>
                </div>

                <p class="text-center"><strong>${item.percentage}</strong></p>
            `;
  listItem.appendChild(panel);

  timelineContainer.appendChild(listItem);
      });
    }

  generateTimelineItems();

.timeline,
.timeline-horizontal {
  list-style: none;
  padding: 20px;
  position: relative;
  width: 100%;
}

.timeline:before {
  top: 0;
  bottom: 0;
  position: absolute;
  content: " ";
  width: 10px;
  background-color: transparent;
  left: 50%;
  margin-left: -5px;
  border: 10px solid #ccc;
  /* Set the color for the empty part of the progress bar */
  border-radius: 5px;
}

.timeline .timeline-item {
  margin-bottom: 20px;
  position: relative;
}

.timeline .timeline-item:before,
.timeline .timeline-item:after {
  content: "";
  display: table;
}

.timeline .timeline-item:after {
  clear: both;
}

.timeline .timeline-item .timeline-panel {
  position: relative;
  max-width: 150px;
  width: 150px;
  border: 1px solid #c0c0c0;
  background: #ffffff;
  border-radius: 2px;
  padding: 20px;
  -webkit-box-shadow: 0 1px 6px rgba(0, 0, 0, 0.175);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.175);
}

.timeline .timeline-item .timeline-panel:before {
  position: absolute;
  top: 26px;
  display: inline-block;
  border-top: 16px solid transparent;
  border-left: 16px solid #c0c0c0;
  border-right: 0 solid #c0c0c0;
  border-bottom: 16px solid transparent;
  content: " ";
}

.timeline-horizontal {
  list-style: none;
  position: relative;
  padding: 20px 0px 20px 0px;
  display: inline-block;
}

.timeline-horizontal:before {
  height: 3px;
  top: auto;
  bottom: 26px;
  left: 56px;
  right: 0;
  width: 100%;
  margin-bottom: 20px;
}

.timeline-horizontal .timeline-item {
  display: table-cell;
  height: 280px;
  float: none !important;
  padding-left: 0px;
  padding-right: 0px;
  margin: 0 auto;
  vertical-align: bottom;
}

.timeline-horizontal .timeline-item .timeline-panel {
  top: auto;
  bottom: 64px;
  display: inline-block;
  float: none !important;
  left: 0 !important;
  right: 0 !important;
  width: 100%; */
  width: 320px;
  margin-bottom: 5px;
}

.timeline-horizontal .timeline-item .timeline-panel:before {
  top: auto;
  bottom: -16px;
  left: 28px !important;
  right: auto;
  border-right: 16px solid transparent !important;
  border-top: 16px solid #c0c0c0 !important;
  border-bottom: 0 solid #c0c0c0 !important;
  border-left: 16px solid transparent !important;
}

.timeline-horizontal .timeline-item:before,
.timeline-horizontal .timeline-item:after {
  display: none;
}

.timeline-horizontal .timeline-item .timeline-badge {
  top: auto;
  bottom: 0px;
  left: 43px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
  <div class="row">
    <div class="col-md-12">
      <div style="display: inline-block; width: 100%; overflow-y: auto">
        <ul class="timeline timeline-horizontal" id="custom-timeline"></ul>
      </div>
    </div>
  </div>
</div>

Answer 1

如果你想根据数据中提供的值动态填充此进度条的颜色。您可以编写一个函数来根据百分比值定义颜色

enter code here
 listItem.style.backgroundColor = getColorForPercentage(percentage);

function getColorForPercentage(percentage) {
  // Define your color logic based on percentage values
  if (percentage >= 75) {
    return 'green';
  } else if (percentage >= 50) {
    return 'yellow';
  } else {
    return 'red';
  }
}