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<!DOCTYPE html> <html lang="zh"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Bootstrap4 自定义选择框的大小 - 迹忆客(jiyik.com)</title> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css"> <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.bundle.min.js"></script> <style> .bs-example{ margin: 20px; } </style> </head> <body> <div class="bs-example"> <form> <select class="form-select form-select-lg"> <option selected>大的自定义选择下拉框</option> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select> <select class="form-select mt-3"> <option selected>默认的自定义选择下拉框</option> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select> <select class="form-select form-select-sm mt-3"> <option selected>小的自定义选择下拉框</option> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select> </form> </div> </body> </html>
