本文實例為大家分享了js飄落星星特效的具體代碼，供大家參考，具體內容如下
1.效果圖
2.代碼
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> img{ position: absolute; } body { background-image: url(img/bg.jpg); background-size: 100%; } </style> <script> function Star() { this.speed=10; this.img=new Image(); this.img.src="img/star"+parseInt(Math.random()*4+1)+".png"; this.img.style.width=50+'px'; this.img.style.height=50+'px'; this.img.style.top=Math.random()*window.innerHeight+1+'px'; this.img.style.left=Math.random()*window.innerWidth+1+'px'; document.body.appendChild(this.img); } Star.prototype.slip=function () { var that=this; function move() { that.img.style.top=that.img.offsetTop+that.speed+'px'; console.log(that.img.offsetTop+"star"); console.log(window.innerHeight+"window"); if(that.img.offsetTop>window.innerHeight){ clearInterval(sh); that.img.style.height=0; that.img.style.width=0; } } var sh=setInterval(move,100); } setInterval(function () { for(var i=1;i<5;i++){ new Star().slip(); } },1000) </script> </head> <body> </body> </html> 以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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