abstract:<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title></title></head><body> <button id=&qu
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<button id="btn1">点击</button>
<button id="bnt2">点击</button>
<button id="btn3">点击</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>
Correcting teacher:天蓬老师Correction time:2019-04-10 10:23:57
Teacher's summary:你的学生用户名, 怎么没有显示呢? 看一下你的用户设置, 设置一个名字