Javascript 引导选择选择器显示：未捕获类型错误：无法设置属性'_菜单'；未定义的
我正在使用bootstrap selectpicker，但每当我单击下拉列表时，它都会显示一些错误，我无法执行数据实时搜索，即使我更改了bootstrap版本，但不适用于我 链接：Javascript 引导选择选择器显示：未捕获类型错误：无法设置属性'_菜单'；未定义的,javascript,html,jquery,bootstrap-4,bootstrap-selectpicker,Javascript,Html,Jquery,Bootstrap 4,Bootstrap Selectpicker,我正在使用bootstrap selectpicker，但每当我单击下拉列表时，它都会显示一些错误，我无法执行数据实时搜索，即使我更改了bootstrap版本，但不适用于我 链接： <link rel="stylesheet" type="text/css" href="<?= base_url('assets/') ?>app-assets/css/bootstrap.css"> // Bootstrap
<link rel="stylesheet" type="text/css" href="<?= base_url('assets/') ?>app-assets/css/bootstrap.css"> // Bootstrap v4.0.0-alpha.4
<link rel="stylesheet" href="<?= base_url() ?>assets/selectpicker/bootstrap-select.min.css"> // Bootstrap-select v1.13.12
<script src="<?= base_url('assets/') ?>app-assets/js/jquery.min.js"></script> // jQuery v3.3.1
<script src="<?= base_url() ?>assets/selectpicker/bootstrap-select.min.js"></script> // Bootstrap-select v1.13.12
<script src="<?= base_url('assets/') ?>app-assets/js/core/libraries/bootstrap.min.js" type="text/javascript"></script> // Bootstrap v4.0.0-alpha.5
尝试将CDN链接用于引导。它们工作得很好
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/css/bootstrap.min.css" integrity="sha384-TX8t27EcRE3e/ihU7zmQxVncDAy5uIKz4rEkgIXeMed4M0jlfIDPvg6uqKI2xXr2" crossorigin="anonymous">
<title>Document</title>
</head>
<body>
<select
class="selectpicker"
data-live-search="true"
data-hide-disabled="true"
name="user"
id="user"
>
<option value="">option 1</option>
<option value="">option 2</option>
<option value="">option 3</option>
<option value="">option 4</option>
</select>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ho+j7jyWK8fNQe+A12Hb8AhRq26LrZ/JpcUGGOn+Y7RsweNrtN/tE3MoK7ZeZDyx" crossorigin="anonymous"></script>
</body>
</html>
文件
选择1
选择2
选择3
选择4
尝试使用相同的html链接
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
我使用了您提到的cdn链接，但现在它显示了不同的错误，而且boostrap css不起作用。我这边没有错误。你犯了什么错误？这可能是代码中影响它的其他内容。
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>