This time I will show you how to use jQuery to obtain random colors, and what are the precautions for using jQuery to obtain random colors. The following is a practical case, let's take a look.
1.js
//获取十六进制颜色 function randomColor1(){ var r = Math.floor(Math.random()*256); var g = Math.floor(Math.random()*256); var b = Math.floor(Math.random()*256); if(r < 16){ r = "0"+r.toString(16); }else{ r = r.toString(16); } if(g < 16){ g = "0"+g.toString(16); }else{ g = g.toString(16); } if(b < 16){ b = "0"+b.toString(16); }else{ b = b.toString(16); } return "#"+r+g+b; } $("h3").css("color",randomColor1());
2.html
.
Effect:##The following is a piece of code about several ways to generate random colors in js<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<button id="btn1">调用第一种</button>
<button id="bnt2">调用第二种</button>
<button id="btn3">调用第三种</button>
<script>
var btn1=document.getElementById('btn1');
btn1.onclick=function(){
document.body.style.background=bg1()
};
var btn2=document.getElementById('bnt2');
btn2.onclick=function(){
document.body.style.background=bg2();
};
var btn3=document.getElementById('btn3');
btn3.onclick=function(){
document.body.style.background=bg3();
};
function bg1(){
return '#'+Math.floor(Math.random()*256).toString(10);
}
function bg2(){
return '#'+Math.floor(Math.random()*0xffffff).toString(16);
}
function bg3(){
var r=Math.floor(Math.random()*256);
var g=Math.floor(Math.random()*256);
var b=Math.floor(Math.random()*256);
return "rgb("+r+','+g+','+b+")";//所有方法的拼接都可以用ES6新特性`其他字符串{$变量名}`替换
}
</script>
</body>
</html>
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