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Several ways to generate random colors in js

高洛峰
高洛峰Original
2016-10-15 16:10:361047browse

<!DOCTYPE html>
<html>
<head>
    <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(&#39;btn1&#39;);
         btn1.onclick=function(){
             document.body.style.background=bg1()
         };
         var btn2=document.getElementById(&#39;bnt2&#39;);
         btn2.onclick=function(){
             document.body.style.background=bg2();
         };
         var btn3=document.getElementById(&#39;btn3&#39;);
         btn3.onclick=function(){
             document.body.style.background=bg3();
         };
         function bg1(){
             return &#39;#&#39;+Math.floor(Math.random()*256).toString(10);
         }
         function bg2(){
             return &#39;#&#39;+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+&#39;,&#39;+g+&#39;,&#39;+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>


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