本篇内容主要讲解“怎么用HTML5实现树叶飘落动画”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“怎么用HTML5实现树叶飘落动画”吧!
这款HTML5树叶飘落动画是基于webkit内核的，也就是说要在webkit内核的浏览器上才能使用这款动画。
源码下载 演示地址
HTML代码
XML/HTML Code复制内容到剪贴板
<div id="container">
<!-- The container is dynamically populated using the init function in leaves.js -->
<!-- Its dimensions and position are defined using its id selector in leaves.css -->
<div id="leafContainer"></div>
<!-- its appearance, dimensions, and position are defined using its id selector in leaves.css -->
<div id="message">
<em>这是基于webkit的落叶动画</em>
</div>
</div>
CSS代码
CSS Code复制内容到剪贴板
#container {
position: relative;
height: 700px;
width: 500px;
margin: 10px auto;
overflow: hidden;
border: 4px solid #5C090A;
background: #4E4226 url('images/backgroundLeaves.jpg') no-repeat top left;
}
#leafContainer
{
position: absolute;
width: 100%;
height: 100%;
}
#message
{
position: absolute;
top: 160px;
width: 100%;
height: 300px;
background:transparent url('images/textBackground.png') repeat-x center;
color: #5C090A;
font-size: 220%;
font-family: 'Georgia';
text-align: center;
padding: 20px 10px;
-webkit-box-sizing: border-box;
-webkit-background-size: 100% 100%;
z-index: 1;
}
p {
margin: 15px;
}
a
{
color: #5C090A;
text-decoration: none;
}
em
{
font-weight: bold;
font-style: normal;
}
.phone {
font-size: 150%;
vertical-align: middle;
}
#leafContainer > div
{
position: absolute;
width: 100px;
height: 100px;
-webkit-animation-iteration-count: infinite, infinite;
-webkit-animation-direction: normal, normal;
-webkit-animation-timing-function: linear, ease-in;
}
#leafContainer > div > img {
position: absolute;
width: 100px;
height: 100px;
-webkit-animation-iteration-count: infinite;
-webkit-animation-direction: alternate;
-webkit-animation-timing-function: ease-in-out;
-webkit-transform-origin: 50% -100%;
}
@-webkit-keyframes fade
{
0% { opacity: 1; }
95% { opacity: 1; }
100% { opacity: 0; }
}
@-webkit-keyframes drop
{
0% { -webkit-transform: translate(0px, -50px); }
100% { -webkit-transform: translate(0px, 650px); }
}
@-webkit-keyframes clockwiseSpin
{
0% { -webkit-transform: rotate(-50deg); }
100% { -webkit-transform: rotate(50deg); }
}
@-webkit-keyframes counterclockwiseSpinAndFlip
{
0% { -webkit-transform: scale(-1, 1) rotate(50deg); }
100% { -webkit-transform: scale(-1, 1) rotate(-50deg); }
}
JavaScript代码
JavaScript Code复制内容到剪贴板
const NUMBER_OF_LEAVES = 30;
function init()
{
var container = document.getElementById('leafContainer');
for (var i = 0; i < NUMBER_OF_LEAVES; i++)
{
container.appendChild(createALeaf());
}
}
function randomInteger(low, high)
{
return low + Math.floor(Math.random() * (high - low));
}
function randomFloat(low, high)
{
return low + Math.random() * (high - low);
}
function pixelValue(value)
{
return value + 'px';
}
function durationValue(value)
{
return value + 's';
}
function createALeaf()
{
var leafDiv = document.createElement('div');
var image = document.createElement('img');
image.src = 'images/realLeaf' + randomInteger(1, 5) + '.png';
leafDiv.style.top = "-100px";
leafDiv.style.left = pixelValue(randomInteger(0, 500));
var spinAnimationName = (Math.random() < 0.5) ? 'clockwiseSpin' : 'counterclockwiseSpinAndFlip';
leafDiv.style.webkitAnimationName = 'fade, drop';
image.style.webkitAnimationName = spinAnimationName;
var fadeAndDropDuration = durationValue(randomFloat(5, 11));
var spinDuration = durationValue(randomFloat(4, 8));
leafDiv.style.webkitAnimationDuration = fadeAndDropDuration + ', ' + fadeAndDropDuration;
var leafDelay = durationValue(randomFloat(0, 5));
leafDiv.style.webkitAnimationDelay = leafDelay + ', ' + leafDelay;
image.style.webkitAnimationDuration = spinDuration;
// add the <img> to the <div>
leafDiv.appendChild(image);
return leafDiv;
}
window.addEventListener('load', init, false);
到此，相信大家对“怎么用HTML5实现树叶飘落动画”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
