css控件触发动画 |css给图片加灰色蒙版

<button id="myButton">点击偶触发动画</button>

@keyframes changeColor {
33% { background-color: red; }
66% { background-color: blue; }
}

#myButton {
animation: changeColor 3s;
}

#myButton {
background-color: green;
}
#myButton:hover {
background-color: yellow;
}
#myButton:active {
animation: changeColor 3s;
}