有的網(wǎng)站會(huì)為按鈕添加點(diǎn)擊波紋效果提升網(wǎng)站效果，我們可以簡(jiǎn)單實(shí)現(xiàn)一下：

主要借助::after偽類及CSS3中的transform和transition屬性： 

html:

<div class="container text-center">
        <button class="btn btn-default ripple btn-lg">Button</button>
        <button class="btn btn-default ripple btn-lg">Button with very long content</button>
</div>

.ripple {
    position: relative;
    //隱藏溢出的徑向漸變背景
    overflow: hidden;
}

.ripple:after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    //設(shè)置徑向漸變
    background-image: radial-gradient(circle, #666 10%, transparent 10.01%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform .3s, opacity .5s;
}

.ripple:active:after {
    transform: scale(0, 0);
    opacity: .3;
    //設(shè)置初始狀態(tài)
    transition: 0s;
}

效果：