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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container mt-3"> <h2>单选按钮</h2> <p>下面的表单包含三个单选按钮。默认选中第一项，禁用最后一项：</p> <form action="/demo/html/action_page.php"> <div class="form-check"> <input type="radio" class="form-check-input" id="radio1" name="optradio" value="option1" checked> <label class="form-check-label" for="radio1">选项 1</label> </div> <div class="form-check"> <input type="radio" class="form-check-input" id="radio2" name="optradio" value="option2"> <label class="form-check-label" for="radio2">选项 2</label> </div> <div class="form-check"> <input type="radio" class="form-check-input" disabled> <label class="form-check-label">选项 3</label> </div> <button type="submit" class="btn btn-primary mt-3">提交</button> </form> </div> </body> </html>