js几种生成随机颜色方法

<!DOCTYPE html>

<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
     <button id="btn1">调用第一种</button>
     <button id="bnt2">调用第二种</button>
     <button id="btn3">调用第三种</button>
     <script>
         var btn1=document.getElementById('btn1');
         btn1.onclick=function(){
             document.body.style.background=bg1()
         };
         var btn2=document.getElementById('bnt2');
         btn2.onclick=function(){
             document.body.style.background=bg2();
         };
         var btn3=document.getElementById('btn3');
         btn3.onclick=function(){
             document.body.style.background=bg3();
         };
         function bg1(){
             return '#'+Math.floor(Math.random()*256).toString(10);
         }
         function bg2(){
             return '#'+Math.floor(Math.random()*0xffffff).toString(16);
         }
         function bg3(){
             var r=Math.floor(Math.random()*256);
             var g=Math.floor(Math.random()*256);
             var b=Math.floor(Math.random()*256);
             return "rgb("+r+','+g+','+b+")";//所有方法的拼接都可以用ES6新特性`其他字符串{$变量名}`替换
         }
     </script>
</body>
</html>
posted @ 2016-10-18 10:11  最骚的就是你  阅读(1084)  评论(0编辑  收藏  举报