Posted in Javascript onJanuary 30, 2019
本文实例讲述了JS实现点击按钮随机生成可拖动的不同颜色块。分享给大家供大家参考,具体如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>3water.com JS点击生成随机颜色块</title> <style type="text/css"> div{ width: 100px; height: 100px; background-color: red; position: absolute; margin-left: 10px; float: left; } </style> </head> <body id="body1"> <button onclick="btn()">创建div</button> <script> function btn(){ var id; //动态创建元素 var str=document.createElement("div"); //元素的背景色随机的 str.style.backgroundColor=getColorRandom(); //将生成的div追加到body中 document.getElementById("body1").appendChild(str); //随机生成的id设置为动态创建的div的id str.id="items"+parseInt(Math.random()*10000); // 获取动态生成的div的id var obj=document.getElementById(str.id); var disX=0; var disY=0; //鼠标点击落下事件 obj.onmousedown=function (event){ disX=event.clientX-obj.offsetLeft; disY=event.clientY-obj.offsetTop; //鼠标移开事件 document.onmousemove=function(ev){ obj.style.left=ev.clientX-disX+"px"; obj.style.top=ev.clientY-disY+"px"; } //鼠标松开事件 document.onmouseup= function () { document.onmousemove=null; document.onmouseup=null; } } //生成随机颜色 function getColorRandom(){ var c="#"; var cArray=["0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"]; for(var i=0;i<6;i++){ var cIndex= Math.round(Math.random()*15); c+=cArray[cIndex]; } return c; } } </script> </body> </html>
这里使用在线HTML/CSS/JavaScript代码运行工具:http://tools.3water.com/code/HtmlJsRun测试上述代码,可得如下运行效果:
希望本文所述对大家JavaScript程序设计有所帮助。
JS实现点击按钮随机生成可拖动的不同颜色块示例
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waterDjj声明:登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述。
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