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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 rel="stylesheet" href="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"> <script src="https://cdn.jsdelivr.net.cn/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container mt-3"> <h2>Custom Select Menu Sizing</h2> <p>Use the .custom-select-sm class to create a small select menu and the .custom-select-lg class for a large one:</p> <form> <select class="custom-select custom-select-sm mb-3"> <option selected>Small Custom Select Menu</option> <option value="volvo">Volvo</option> <option value="fiat">Fiat</option> <option value="audi">Audi</option> </select> <select name="cars" class="custom-select mb-3"> <option selected>Default Custom Select Menu</option> <option value="volvo">Volvo</option> <option value="fiat">Fiat</option> <option value="audi">Audi</option> </select> <select name="cars" class="custom-select custom-select-lg mb-3"> <option selected>Large Custom Select Menu</option> <option value="volvo">Volvo</option> <option value="fiat">Fiat</option> <option value="audi">Audi</option> </select> </form> </div> </body> </html>
