html代码：
<body>
<button class="button">Button</button>
</body>
css代码：
<style>
body{
margin: 200px;
}
.button {
display: inline-block;
padding: 1em 2em;
background-color: #ff0081;
color: #fff;
border-radius: 4px;
border: none;
cursor: pointer;
position: relative;
box-shadow: 0 2px 25px rgba(233, 30, 99, 0.5);
outline: 0;
transition: transform ease-in 0.1s, background-color ease-in 0.1s, box-shadow ease-in 0.25s;
}
.button::before{
position: absolute;
content: '';
left: -2em;
right: -2em;
top: -2em;
bottom: -2em;
pointer-events: none;
transition: ease-in-out .5s;
background-repeat: no-repeat;
background-image: radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%),
radial-gradient(circle, #ff0081 20%, transparent 20%);
background-size: 10% 10%, 20% 20%, 15% 15%, 20% 20%, 18% 18%, 10% 10%, 15% 15%, 10% 10%, 18% 18%,
15% 15%, 20% 20%, 18% 18%, 20% 20%, 15% 15%, 10% 10%, 20% 20%;
background-position: 18% 40%, 20% 31%, 30% 30%, 40% 30%, 50% 30%, 57% 30%, 65% 30%, 80% 32%, 15% 60%,
83% 60%, 18% 70%, 25% 70%, 41% 70%, 50% 70%, 64% 70%, 80% 71%;
animation: bubbles ease-in-out .75s forwards;
}
.button:active {
transform: scale(0.95);
background-color: #f3037c;
box-shadow: 0 2px 25px rgba(233, 30, 99, 0.5);
}
.button:active::before {
animation: none;
background-size: 0;
}
@keyframes bubbles {
0% {
background-position: 18% 40%, 20% 31%, 30% 30%, 40% 30%, 50% 30%, 57% 30%, 65% 30%, 80% 32%, 15% 60%,
83% 60%, 18% 70%, 25% 70%, 41% 70%, 50% 70%, 64% 70%, 80% 71%;
}
50% {
background-position: 10% 44%, 0 20%, 15% 5%, 30% 0%, 42% 0%, 62% -2%, 75% 0%, 95% -2%, 0% 80%,
95% 55%, 7% 100%, 24% 100%, 41% 100%, 55% 95%, 68% 96%, 95% 100%;
}
100% {
background-position: 5% 44%, -5% 20%, 7% 5%, 23% 0%, 37% 0, 58% -2%, 80% 0%, 100% -2%, -5% 80%,
100% 55%, 2% 100%, 23% 100%, 42% 100%, 60% 95%, 70% 96%, 100% 100%;
background-size: 0 0;
}
}
</style>
上面介绍了纯CSS实现一个粒子动效的按钮
