css - 三 Angular 形边框的渐变效果

Question

需要为边框添加渐变效果。边框是三 Angular 形的

这里是 the jsfiddle code

.progress-indicator-wrapper {
  margin: 0 10px;
  font-size: 16px;
  color: #2f2f2f;
  background-image: linear-gradient(to bottom, #e7e7e7, #d8d8d8);
}
.progress-indicator {
  display: table;
  width: 100%;
  text-align: center;
  line-height: 20px;
}
.progress-indicator > div {
  display: table-cell;
  margin-top: 0;
  padding: 20px;
  position: relative;
}
.progress-indicator > div.progress-active::before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  border-top: 30px solid transparent;
  border-bottom: 30px solid transparent;
  border-left: 20px solid #e7e7e7;
}
.progress-indicator > div.progress-active::after {
  content: " ";
  position: absolute;
  right: -20px;
  top: 0;
  border-top: 30px solid transparent;
  border-bottom: 30px solid transparent;
  border-left: 20px solid #2980b9;
}
.progress-active {
  color: #fff;
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
}

<div class="progress-indicator-wrapper">
  <div class="progress-indicator">
    <div>
      <span class="progress-txt">Step 1 </span>
    </div>
    <div class="progress-active">
      <span class="progress-txt">Step 2</span>
    </div>
    <div>
      <span class="progress-txt">Step 3</span>
    </div>
    <div>
      <span class="progress-txt">Step 4</span>
    </div>
    <div>
      <span class="progress-txt">Step 5</span>
    </div>
  </div>
</div>

我面临着为“border-left”添加渐变而不是纯色的问题。并且需要保持三 Angular 形。

或

还有其他方法可以仅使用 CSS 来做到这一点吗？

Answer 1

您可以使用 SVG as background-image 来实现它(但由于缺乏浏览器支持，它现在可能适用于所有浏览器)。

下面的SVG文件将创建你想要的效果。

<svg version='1.1' xmlns='http://www.w3.org/2000/svg' width='132' height='60' viewBox='0 0 132 60'>
    <defs>
        <linearGradient id='Gradient1'>
            <stop stop-color='%233498db' offset='0%'/>
            <stop stop-color='%232980b9' offset='100%'/>
        </linearGradient>
    </defs>
    <polygon points='0,0 112,0 132,30 112,60 0,60 15,30' fill='url(%23Gradient1)'></polygon>
</svg>

您可以将其用作背景图片，如下所示。

.progress-indicator-wrapper {
  margin: 0 10px;
  font-size: 16px;
  color: #2f2f2f;
  background-image: linear-gradient(to bottom, #e7e7e7, #d8d8d8);
}
.progress-indicator {
    display: table;
    width: 100%;
    text-align: center;
    line-height: 20px;
}
.progress-indicator > div {
    display: table-cell;
    margin-top: 0;
    padding: 13px 20px;
    position: relative;
}
.progress-active {
  background: url("data:image/svg+xml;utf8,<svg version='1.1' xmlns='http://www.w3.org/2000/svg' width='132' height='60' viewBox='0 0 132 60'><defs>  <linearGradient id='Gradient1'><stop stop-color='%233498db' offset='0%'/><stop stop-color='%232980b9' offset='100%'/></linearGradient></defs><polygon points='0,0 112,0 132,30 112,60 0,60 15,30' fill='url(%23Gradient1)'></polygon></svg>")  no-repeat;
  background-size: 100% 100%;
  color: #fff;
}

<div class="progress-indicator-wrapper">
  <div class="progress-indicator">
    <div>
      <span class="progress-txt">Step 1 </span>
    </div>
    <div class="progress-active">
      <span class="progress-txt">Step 2</span>
    </div>
    <div>
      <span class="progress-txt">Step 3</span>
    </div>
    <div>
      <span class="progress-txt">Step 4</span>
    </div>
    <div>
      <span class="progress-txt">Step 5</span>
    </div>
  </div>
</div>