Question

当用户滚动到页面的那一部分时，我只是想让以下代码的动画成为活动状态。这只需要发生一次，直到刷新页面，动画才会再次发生。

    <ul class="skill-list">
      <li class="skill">
        <h3>Nunchucks</h3>
        <progress class="skill-1" max="100" value="50">
          <strong>Skill Level: 50%</strong>
        </progress>
      </li>
      <li class="skill">
        <h3>Bow Staff</h3>
        <progress class="skill-2" max="100" value="75">
          <strong>Skill Level: 75%</strong>
        </progress>
      </li>
      <li class="skill">
        <h3>Roundhouse Kick</h3>
        <progress class="skill-3" max="100" value="25">
          <strong>Skill Level: 25%</strong>
        </progress>
      </li>
    </ul>

这是CSS：

<!-- skill chart -->
body {
  font-family: 'Open Sans', sans-serif;
  padding: 2em;
}

h1 {
  font-size: 2em;
  font-weight: 800;
}

h3 {
  font-size: 2em;
}

progress, progress[role] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  border: none;
  background-size: auto;
  height: 100px;
  width: 100%;
}

.skill-list {
  list-style: none;
  margin: 0;
  padding: 1em;
}

.skill {
  margin-bottom: 1em;
  position: relative;
}
.skill h3 {
  color: #fff;
  left: 1em;
  line-height: 1;
  position: absolute;
  top: 1em;
}
.skill ::-webkit-progress-value {
  -webkit-animation: bar-fill 2s;
  width: 0px;
}

.skill-1::-webkit-progress-value {
  background: #ff9e2c;
}

.skill-1::-moz-progress-bar {
  background: #ff9e2c;
}

.skill-2::-webkit-progress-value {
  background: #4ecdc4;
}

.skill-2::-moz-progress-bar {
  background: #4ecdc4;
}

.skill-3::-webkit-progress-value {
  background: #ff6b6b;
}

.skill-3::-moz-progress-bar {
  background: #ff6b6b;
}

@-webkit-keyframes bar-fill {
  0% {
    width: 0;
  }
}
@keyframes bar-fill {
  0% {
    width: 0;
  }
}

Answer 1

你需要一个可以跟踪滚动位置的脚本，这里是wow.js

https://github.com/matthieua/WOW

当用户滚动到该部分页面时激活CSS动画

1 个答案: