# 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。

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

```css
/* 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: 35px;
  animation: 2s change2 infinite linear-out-slow-in;
}
/* 颜色与不透明度变化 */
@keyframes change{
  from {
    background-color: #f76160;
    opacity: 1;
  }
  to {
    background-color: #09ba07;
    opacity: 0;
  }
}
/* 父组件大小变化 */
@keyframes change1 {
  0% {
    width: 20%;
    height: 100px;
  }
  100% {
    width: 80%;
    height: 200px;
  }
}
/* 子组件文字缩放 */
@keyframes change2 {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1.5);
  }
}
```

![](https://contentcenter-vali-drcn.dbankcdn.cn/pvt_2/DeveloperAlliance_scene_100_1/a4/v3/C_CtRlL6S7Wdo-VM6jnh2Q/zh-cn_image_0000002803224053.gif?HW-CC-KV=V1&HW-CC-Date=20261026T101424Z&HW-CC-Expire=31536000000&HW-CC-Sign=0903F73EEC09E9507E5983C048DF77BC46DCA7D8C6D85A70E1AA9EA3BFF08401)
> 说明
>
> * animation取值不区分先后，duration （动画执行时间）/ delay （动画延迟执行时间）按照出现的先后顺序解析。
>
> * 必须设置animation-duration样式，否则时长为0则不会有动画效果。当设置animation-fill-mode属性为forwards时，组件直接展示最后一帧的样式。