<!DOCTYPE html>
<html>
<head>
    <title>清除注释</title>
    <meta charset="UTF-8">
    <script>
        function clearComments() {
            var input = document.getElementById("input");
            var output = input.value.replace(/\/\*[\s\S]*?\*\/|\/\/.*/g, '');
            input.value = output;
        }
    </script>
</head>
<body>
    <input type="text" id="input" placeholder="请输入内容">
    <button onclick="clearComments()">清除注释</button>
</body>
</html>