未捕獲的類型錯誤：$(...).combobox 不是 function

Question

我在這一行中遇到了 Uncaught TypeError: undefined is not a function

<link rel="stylesheet" href="<?php echo base_url();?>assets/usser_assets/css/bootstrap-combobox.css" type="text/css" >
    <link rel="stylesheet" href="<?php echo base_url();?>assets/usser_assets/css/style.css" type="text/css" >

    <link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>

         <script src="<?php echo base_url();?>assets/usser_assets/js/bootstrap-combobox.js"></script>
    <script>
    $(document).ready(function () {
        $('.combobox').combobox()
    });
</script>

和

<div class="col-md-3 col-sm-6 col-xs-12">
                                <select class="form-control data-search-field combobox"  >
                                    <option value="">Select Tyre Brand</option>
                                    <?php foreach ($tyre_model_list as $row) {

                                       ?> 
                                   <option value="<?php echo $row->tyre_brand_id;?>"><?php echo $row->name;?></option>
                                    <?php }?>
                                </select>


                            </div>

這是什么意思？ combobox填寫正確。 怎么了？

Answer 1

它似乎對我有用，我沒有收到任何錯誤：

 $(document).ready(function () { $('.combobox').combobox() });

 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-combobox/1.2.0/css/bootstrap-combobox.min.css" type="text/css" > <link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-combobox/1.2.0/js/bootstrap-combobox.min.js"></script> <div class="col-md-3 col-sm-6 col-xs-12"> <select class="form-control data-search-field combobox" > <option value="">Select Tyre Brand</option> <option value="option1">option 1</option> <option value="option2">option 2</option> <option value="option3">option 3</option> </select> </div>