# 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
fading away
getting bigger
``` ```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); } } ``` ![zh-cn_image_0000001217168141](figures/zh-cn_image_0000001217168141.gif) > **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。