首先需要获取屏幕大小:
var screenWidth = document.documentElement.clientWidth; var screenHeight = document.documentElement.clientHeight;
接着可以定义动画(星星透明度):
@keyframes flash { 0%{opacity: 0} 25%{opacity: 0.25} 50%{opacity: 0.5} 75%{opacity: 0.75} 100%{opacity: 1} }
全部代码如下:
<!DOCTYPE html> <html lang=\"en\"> <head> <meta charset=\"UTF-8\"> <title>Title</title> <style> div{ width: 70px; height: 80px; background: url(\"./images/star.jpg\") no-repeat; animation: flash 1s; } body{ background-color: black } @keyframes flash { 0%{opacity: 0} 25%{opacity: 0.25} 50%{opacity: 0.5} 75%{opacity: 0.75} 100%{opacity: 1} } </style> </head> <body> <script> var screenWidth = document.documentElement.clientWidth; var screenHeight = document.documentElement.clientHeight; // 生产50个星星 for (let i = 0; i <50 ; i++) { var box=document.createElement(\'div\'); document.body.appendChild(box); x=Math.random()*screenWidth; y=Math.random()*screenHeight; box.style.position=\'relative\'; box.style.left=x+\'px\'; box.style.right=y+\'px\'; } boxList=document.getElementsByTagName(\"div\"); for (let i = 0; i < boxList.length; i++) { boxList[i].onmouseover=function () { this.style.transform=\'scale(1.5,1.5)\'; }; boxList[i].onmouseout=function () { this.style.transform=\'scale(1,1)\'; }; } </script> </body> </html>
效果如下:
以上就是js实现星星海特效的示例的详细内容,更多关于js 星星海特效的资料请关注免费资源网其它相关文章!
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