CSS Touch Ripple效果，无法正常工作

Question

我的CSS触控纹波无法正常工作。当我点击按钮时，它就像中间的气泡一样。请帮忙找出我在哪里做错了。我不太了解CSS动画。我想只用CSS做这个。

cases

.ripple-con,
.button {
  display: inline-block;
  position: relative;
  overflow: hidden;
}

.button::after,
.ripple {
  content: ' ';
  background: rgba(0, 0, 0, 0.3);
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  display: inline-block;
  border-radius: 100%;
}

.button:active::after,
.ripple:active,
.button:active+.ripple {
  animation: ripple 2s;
}

@keyframes ripple {
  to {
    opacity: 0;
    margin: -250px;
    width: 500px;
    height: 500px;
  }
}

.button {
  line-height: 39px;
  border: 0;
  height: 42px;
  box-sizing: border-box;
  padding: 0 20px;
  background: #888;
  border-radius: 5px;
  cursor: default;
  vertical-align: top;
}

html {
  text-align: center
}

body {
  display: inline-block
}

Answer 1

只需将animation: ripple置于.button::after, .ripple样式定义中，并将animation: none置于活动状态，如下所示

.ripple-con,
.button {
  display: inline-block;
  position: relative;
  overflow: hidden;
}

.button::after,
.ripple {
  content: ' ';
  background: rgba(0, 0, 0, 0.3);
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  display: inline-block;
  border-radius: 100%;
  animation: ripple 2s;
}

.button:active::after,
.ripple:active,
.button:active + .ripple {
  animation: none;
}

@keyframes ripple {
  to {
    opacity: 0;
    margin: -250px;
    width: 500px;
    height: 500px;
  }
}

.button {
  line-height: 39px;
  border: 0;
  height: 42px;
  box-sizing: border-box;
  padding: 0 20px;
  background: #888;
  border-radius: 5px;
  cursor: default;
  vertical-align: top;
}

html {
  text-align: center
}

body {
  display: inline-block
}

<div class="ripple-con">
  <input class="button" type="submit" value="Submit Button : Button">
  <span class="ripple"></span>
</div>

<div class="ripple-con">
  <input class="button" type="button" value="Input Button : Button">
  <span class="ripple"></span>
</div>

<div class="button">Div : Button</div>

<button class="button">Button : Button</button>

以下是fiddle