HarmonyOS鸿蒙开发指南:JS web 动效开发指导CSS动画_鸿蒙控制div显示隐藏

属性样式动画

在关键帧（Keyframes）中动态设置父组件的width和height，实现组件变大缩小。子组件设置scale属性使父子组件同时缩放，再设置opacity实现父子组件的显示与隐藏。

<!-- xxx.hml -->
<div class="container">
  <div class="fade">
    <text>fading away</text>
  </div>
  <div class="bigger">
    <text>getting bigger</text>
  </div>
</div>

/* xxx.css */
.container {
  background-color:#F1F3F5;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  width: 100%;
  height: 100%;
}
.fade{
  width: 30%;
  height: 200px;
  left: 35%;
  top: 25%;
  position: absolute;
  animation: 2s change infinite friction;
}
.bigger{
  width: 20%;
  height: 100px;
  background-color: blue;
  animation: 2s change1 infinite linear-out-slow-in;
}
text{
  width: 100%;
  height: 100%;
  text-align: center;
  color: white;
  font-size: