按钮使用随件颜色
2022-03-08 本文已影响0人
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按钮使用随件颜色
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body {
font-family: "Microsoft YaHei", serif;
user-select: none
}
body,
dl,
dd,
p,
h1,
h2,
h3,
h4,
h5,
h6 {
margin: 0;
}
ol,
ul,
li {
margin: 0;
padding: 0;
list-style: none;
}
img {
border: none;
}
#button {
width: 100px;
height: 35px;
line-height: 35px;
cursor: pointer;
text-align: center;
font-size: 14px;
border: 1px solid #ffd9ae;
}
#button.pink {
background-color: pink;
color: white;
}
#button.blue {
background-color: blue;
color: #AAA;
}
#button.red {
background-color: red;
color: #ffd9ae
}
#button.orange {
background-color: orange;
color: #f1f1f1;
}
</style>
</head>
<body>
<div id="button" class="pink">按钮</div>
<script>
//按钮切换多个背景颜色
//1、获取元素
let oBtn = document.getElementById('button')
//2、罗列一个数组 放背景颜色
let bgArr = ['pink', 'blue', 'red', 'orange']
let i = 0;//定义索引
// let len = bgArr.length;
//3、绑定事件
oBtn.onclick = function () {
// this.style.backgroundColor = '#'+Math.random().toString(16).substr(2,6);//使用随机函数获得随机数，随机颜色
// i++
// if (i >= len) {
// i = 0
// }
i = ++i % 4;
console.log(bgArr[i]);
this.className = bgArr[i]//循环改变背景颜色
}
</script>
</body>
</html>
