html5+css3点击按钮水波扩散特效
1、新建html文档。
2、书写html。
<h1>扁平风格css3按钮</h1>
<section class="container">
<button class="btn color-1 material-design" data-color="#2f5398">Press me!</button>
<button class="btn color-2 material-design" data-color="#004740">Press me!</button>
<button class="btn color-3 material-design" data-color="#f34711">Press me!</button>
<button class="btn color-4 material-design" data-color="#d2181c">Press me!</button>
<button class="btn btn-round color-1 material-design" data-color="#ffffff">Senden</button>
<button class="btn btn-round color-2 material-design" data-color="#ffffff">Senden</button>
<button class="btn btn-round color-3 material-design" data-color="#ffffff">Senden</button>
<button class="btn btn-round color-4 material-design" data-color="#ffffff">Senden</button>
<button class="btn btn-border color-1 material-design" data-color="#2f5398">Senden</button>
<button class="btn btn-border color-2 material-design" data-color="#004740">Senden</button>
<button class="btn btn-border color-3 material-design" data-color="#f34711">Senden</button>
<button class="btn btn-border color-4 material-design" data-color="#d2181c">Senden</button>
<button class="btn btn-border btn-round color-1 material-design" data-color="#426FC5">Senden</button>
<button class="btn btn-border btn-round color-2 material-design" data-color="#00897b">Senden</button>
<button class="btn btn-border btn-round color-3 material-design" data-color="#f6774f">Senden</button>
<button class="btn btn-border btn-round color-4 material-design" data-color="#e94043">Senden</button>
</section>
3、书写css样式。
* { box-sizing: border-box; outline: none; }
body { font-family: 'Open Sans'; font-size: 100%; font-weight: 300; line-height: 1.5em; text-align: center; }
h1 { color: #666666; font-size: 2rem; line-height: 1.5em; margin: 2em 0 2em 0; }
.box { margin: 1rem; width: 18.75rem; }
.box img { width: 100%; }
.btn { border: none; color: white; overflow: hidden; margin: 1rem; padding: 0; text-transform: uppercase; width: 150px; height: 40px; cursor: pointer; }
.btn.color-1 { background-color: #426fc5; }
.btn.color-2 { background-color: #00897b; }
.btn.color-3 { background-color: #f6774f; }
.btn.color-4 { background-color: #e94043; }
.btn-border.color-1 { background-color: transparent; border: 2px solid #426fc5; color: #426fc5; }
.btn-border.color-2 { background-color: transparent; border: 2px solid #00897b; color: #00897b; }
.btn-border.color-3 { background-color: transparent; border: 2px solid #f6774f; color: #f6774f; }
.btn-border.color-4 { background-color: transparent; border: 2px solid #e94043; color: #e94043; }
.btn-round { border-radius: 10em; }
.material-design { position: relative; }
.material-design canvas { opacity: 0.25; position: absolute; top: 0; left: 0; }
.container { align-content: center; align-items: flex-start; display: flex; flex-direction: row; flex-wrap: wrap; justify-content: center; margin: 0 auto; max-width: 46rem; }
4、书写js。并添加引用。
<script type="text/javascript" src="js/script.js"></script>
var canvas = {},
centerX = 0,
centerY = 0,
color = '',
containers = document.getElementsByClassName('material-design')
context = {},
element = {},
radius = 0,
requestAnimFrame = function () {
return (
window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (callback) {
window.setTimeout(callback, 1000 / 60);
}
);
} (),
init = function () {
containers = Array.prototype.slice.call(containers);
for (var i = 0; i < containers.length; i += 1) {
canvas = document.createElement('canvas');
canvas.addEventListener('click', press, false);
containers[i].appendChild(canvas);
canvas.style.width ='100%';
canvas.style.height='100%';
canvas.width = canvas.offsetWidth;
canvas.height = canvas.offsetHeight;
}
},
press = function (event) {
color = event.toElement.parentElement.dataset.color;
element = event.toElement;
context = element.getContext('2d');
radius = 0;
centerX = event.offsetX;
centerY = event.offsetY;
context.clearRect(0, 0, element.width, element.height);
draw();
},
draw = function () {
context.beginPath();
context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
context.fillStyle = color;
context.fill();
radius += 2;
if (radius < element.width) {
requestAnimFrame(draw);
}
};
init();
5、网页整体代码结构。
6、查看效果。
7、查看效果，点击之后。
