<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>随机颜色案例</title>
</head>
<body>
<script>
// 1.定义一个随机颜色函数
function getRandomColor(flag) {
// 3.是true 则返回#fffff样式的
if (flag) {
let str = '#'
let arr = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f']
// 利用for循环重复抽取六次
// 每一次从数组中随机抽取一个数
for (let i = 1; i <= 6; i++) {
let random = Math.floor(Math.random() * arr.length)
str += arr[random]
}
return str
} else {
// 4.如果是false,则返回rgb(255,255,255)
let r = Math.floor(Math.random() * 256)
let g = Math.floor(Math.random() * 256)
let b = Math.floor(Math.random() * 256)
return `rgb{${r},${g},${b}}`
}
}
// 2.调用函数
console.log(getRandomColor(false))
console.log(getRandomColor(true))
</script>
</body>
</html>
![image]()