console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
<head>
    <title>随机选项</title>
</head>
<body>
    <button onclick="setRandomOptions()">设置随机选项</button>

    <script>
        function setRandomOptions() {
            // 随机选项数组
            var options = ["选项1", "选项2", "选项3", "选项4", "选项5"];
            
            // 从数组中随机选择三个选项
            var randomOptions = [];
            while (randomOptions.length < 3) {
                var randomIndex = Math.floor(Math.random() * options.length);
                var randomOption = options[randomIndex];
                if (!randomOptions.includes(randomOption)) {
                    randomOptions.push(randomOption);
                }
            }
            
            // 设置选项文本到<body>元素
            var body = document.body;
            body.textContent = "随机选项：" + randomOptions.join(", ");
        }
    </script>
</body>
</html>