console 命令行工具 X clear

console

// 选项
var items = ['学习', '睡觉', '打游戏'];

// 选几个
var count = 1

function getRandomArrayElements(arr, count) {
    var shuffled = arr.slice(0), i = arr.length, min = i - count, temp, index;
    while (i-- > min) {
        index = Math.floor((i + 1) * Math.random());
        temp = shuffled[index];
        shuffled[index] = shuffled[i];
        shuffled[i] = temp;
    }
    return shuffled.slice(min);
}

document.getElementById('content').innerHTML = getRandomArrayElements(items, count);

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="content-type" content="text/html; charset=utf-8" />
        <title></title>
    </head>
    <body>
        <div id="content">
            
        </div>
    </body>
</html>