Animate.css空中美元钞票飘落动画特效

js代码

<script>
	const NUMBER_OF_LEAVES = 15;
  const width=window.screen.width;
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/cash\' + randomInteger(3, 7) + \'.png\';
    leafDiv.style.top = \"-100px\";
    leafDiv.style.left = pixelValue(randomInteger(0, width));
    var spinAnimationName = (Math.random() < 0.5) ? \'clockwiseSpin\' : \'counterclockwiseSpinAndFlip\';
    leafDiv.style.webkitAnimationName = \'fade, drop\';
    image.style.webkitAnimationName = spinAnimationName;
    var fadeAndDropDuration = durationValue(randomFloat(3, 9));
    var spinDuration = durationValue(randomFloat(3, 7));
    leafDiv.style.webkitAnimationDuration = fadeAndDropDuration + \', \' + fadeAndDropDuration;
    var leafDelay = durationValue(randomFloat(0, 0));
    leafDiv.style.webkitAnimationDelay = leafDelay + \', \' + leafDelay;
    image.style.webkitAnimationDuration = spinDuration;
    leafDiv.appendChild(image);
    return leafDiv;
}
window.addEventListener(\'load\', init, false);
</script>