A Pen by Dolphin Wood.

Android-L-Ripple-Effect.markdown

Android L Ripple Effect

Android L ripple effect with CSS3 and Javascript.

A Pen by Dolphin Wood on CodePen.

License.

index.html

<div id="wrap">
	<h1>Android L Ripple Effect</h1>
	<div id="main">
		<button>BUTTON</button>
		<button>BUTTON</button>
		<button>BUTTON</button>
		<button>BUTTON</button>
	</div>
</div>

script.js

var addRippleEffect = function (e) {
    var target = e.target;
    if (target.tagName.toLowerCase() !== 'button') return false;
    var rect = target.getBoundingClientRect();
    var ripple = target.querySelector('.ripple');
    if (!ripple) {
        ripple = document.createElement('span');
        ripple.className = 'ripple';
        ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px';
        target.appendChild(ripple);
    }
    ripple.classList.remove('show');
    var top = e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop;
    var left = e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft;
    ripple.style.top = top + 'px';
    ripple.style.left = left + 'px';
    ripple.classList.add('show');
    return false;
}

document.addEventListener('click', addRippleEffect, false);

style.css

body {
  margin: 0;
  padding: 0;
}
#wrap {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
}
h1 {
  display: flex;
  margin: 0;
  padding: 0;
  align-items: center;
  flex: 2;
}
#main {
  flex: 5;
}
button {
  position: relative;
  display: block;
  width: 13em;
  height: 3em;
  margin: 2em;
  border: none;
  outline: none;
  letter-spacing: .2em;
  font-weight: bold;
  background: #dfdfdf;
  cursor: pointer;
  overflow: hidden;
  user-select: none;
  border-radius: 2px;
}
button:nth-child(2) {
  color: #fff;
  background: #4285f4;
}
button:nth-child(3) {
  color: #fff;
  background: #00bad2;
}
button:nth-child(4) {
  color: #fff;
  background: #ff8a80;
}
.ripple {
  position: absolute;
  background: rgba(0,0,0,.15);
  border-radius: 100%;
  transform: scale(0);
  pointer-events: none;
}
.ripple.show {
  animation: ripple .75s ease-out;
}
@keyframes ripple {
  to {
    transform: scale(2);
    opacity: 0;
  }
}