js实现点击掉落特效 先看看效果图
话不多说代码
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <script src="https://www.jb51.net/jquery.js"></script> <script> window.onload = function () { var str = ''; var len = 20; var aDiv = document.getElementsByTagName('div'); var timer = null; var num = 0; for ( var i=0; i<len; i++ ) { str += '<div></div>'; } document.body.innerHTML = str; document.onclick = function () { clearInterval( timer ); timer = setInterval( function (){ DM( aDiv[num], 'top', 23, 500 ); num ++; if ( num === len ) { clearInterval( timer ); } }, 100 ); }; }; </script> </head> <body> </body> </html>
我这里引用了封装方法
function DM( obj, attr, dir, target, endFn ) { dir = parseInt(getStyle( obj, attr )) < target ? dir : -dir; clearInterval( obj.timer ); obj.timer = setInterval(function () { var speed = parseInt(getStyle( obj, attr )) + dir; // 步长 if ( speed > target && dir > 0 || speed < target && dir < 0 ) { speed = target; } obj.style[attr] = speed + 'px'; if ( speed == target ) { clearInterval( obj.timer ); /* if ( endFn ) { endFn(); } */ endFn && endFn(); } }, 30); }
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