js滑鼠點選位置 彈出層由中心向四周緩慢擴大
阿新 • • 發佈：2019-02-12
<html> <head> <title>無標題文件</title> <script language="javascript"> var level = 1; var div ; var timeout ; document.onclick = function (event){ var e = event || window.event ; div = document.getElementById('mydiv'); level = 1; if(level === 1){ div.style.marginLeft = e.clientX; div.style.marginTop = e.clientY; div.style.width = '0px'; div.style.height = '0px'; clearTimeout(timeout); } var step = function (){ var width = parseInt(div.style.width.substring(0,div.style.width.length -2)) ; var height = parseInt(div.style.height.substring(0,div.style.height.length -2)); var left = parseInt(div.style.marginLeft.substring(0,div.style.marginLeft.length-2)); var top = parseInt(div.style.marginTop.substring(0,div.style.marginTop.length-2)); div.style.width = (width + 4 ) + 'px'; div.style.height = (height + 2 ) + 'px'; div.style.marginLeft = (left - (width+4) /2 +width/2) + 'px'; div.style.marginTop = (top - (height+2)/2 +height/2) + 'px'; if(level <= 50){ level = level +1 ; timeout= setTimeout(step,10); } } timeout = setTimeout(step,10); } </script> </head> <body> <div id="mydiv" style="background-color:#99FF00;width:0px;height:0px; position:absolute;"></div> </body> </html>