Jquery OnChange根本不起作用(Jquery OnChange Won't work at all)

Jquery OnChange根本不起作用(Jquery OnChange Won't work at all)

我试图在选择框上触发onchange，以显示已选择作为警报的值。

我当前的选择框代码如下：

<span class="location select-box"> <input class="value-holder" type="text" disabled="disabled" placeholder="Select a Location"> <div class="advanced-select-button"> <i class="fa fa-chevron-down"></i> </div> <ul class="select-clone custom-list"> <li data-value="1">Advertising</li> <li data-value="2">Airport</li> <li data-value="3">Cars</li> <li data-value="4">Education</li> <li data-value="5">Entertainment</li> <li data-value="6">Garden</li> <li data-value="2">Airport</li> <li data-value="3">Cars</li> <li data-value="4">Education</li> <li data-value="5">Entertainment</li> <li data-value="6">Garden</li> <li data-value="2">Airport</li> <li data-value="3">Cars</li> </ul> <select name="Select_Location" data-placeholder="Select a Location"> <option>Select Category</option> <option value="1">Advertising</option> <option value="2">Airport</option> <option value="3">Cars</option> <option value="4">Education</option> <option value="5">Entertainment</option> <option value="6">Garden</option> <option value="2">Airport</option> <option value="3">Cars</option> <option value="4">Education</option> <option value="5">Entertainment</option> <option value="6">Garden</option> <option value="2">Airport</option> <option value="3">Cars</option> </select> </span>

我当前的jquery脚本如下：

<script> $('select').on('change', function() { alert( this.value ); }) </script>

我看不出我错在哪里，或者我在这里做错了什么。 上面的Jquery代码只是我尝试过的许多迭代之一，没有成功。

如果有人能为我解决这个问题 - 我将永远感激不尽。

提前致谢。

ps - 如果你想看一个例子 - 我可以提供一个URL。

I am trying to trigger an onchange on a select box, to show the value that has been selected as an alert.

My current select box code is as follows:

<span class="location select-box"> <input class="value-holder" type="text" disabled="disabled" placeholder="Select a Location"> <div class="advanced-select-button"> <i class="fa fa-chevron-down"></i> </div> <ul class="select-clone custom-list"> <li data-value="1">Advertising</li> <li data-value="2">Airport</li> <li data-value="3">Cars</li> <li data-value="4">Education</li> <li data-value="5">Entertainment</li> <li data-value="6">Garden</li> <li data-value="2">Airport</li> <li data-value="3">Cars</li> <li data-value="4">Education</li> <li data-value="5">Entertainment</li> <li data-value="6">Garden</li> <li data-value="2">Airport</li> <li data-value="3">Cars</li> </ul> <select name="Select_Location" data-placeholder="Select a Location"> <option>Select Category</option> <option value="1">Advertising</option> <option value="2">Airport</option> <option value="3">Cars</option> <option value="4">Education</option> <option value="5">Entertainment</option> <option value="6">Garden</option> <option value="2">Airport</option> <option value="3">Cars</option> <option value="4">Education</option> <option value="5">Entertainment</option> <option value="6">Garden</option> <option value="2">Airport</option> <option value="3">Cars</option> </select> </span>

My current jquery script is as follows:

<script> $('select').on('change', function() { alert( this.value ); }) </script>

I can't see where I am going wrong, or what I am doing wrong here. The above Jquery code is just one of many iterations I've tried without success.

If someone can figure this out for me - I would be eternally grateful.

Thanks in advance.

p.s - if you would like to see an example - I can provide a URL.

最满意答案

$(document).ready(function(){
    $('select').on('change', function() {
    alert( this.value );
    })
}); 
  
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span class="location select-box">
  <input class="value-holder" type="text" disabled="disabled" placeholder="Select a Location">
<div class="advanced-select-button">
  <i class="fa fa-chevron-down"></i>
</div>
<ul class="select-clone custom-list">
  <li data-value="1">Advertising</li>
  <li data-value="2">Airport</li>
  <li data-value="3">Cars</li>
  <li data-value="4">Education</li>
  <li data-value="5">Entertainment</li>
  <li data-value="6">Garden</li>
  <li data-value="2">Airport</li>
  <li data-value="3">Cars</li>
  <li data-value="4">Education</li>
  <li data-value="5">Entertainment</li>
  <li data-value="6">Garden</li>
  <li data-value="2">Airport</li>
  <li data-value="3">Cars</li>
</ul>

<select name="Select_Location" data-placeholder="Select a Location">
   <option>Select Category</option>
          <option value="1">Advertising</option>
          <option value="2">Airport</option>
          <option value="3">Cars</option>
          <option value="4">Education</option>
          <option value="5">Entertainment</option>
          <option value="6">Garden</option>
          <option value="2">Airport</option>
          <option value="3">Cars</option>
          <option value="4">Education</option>
          <option value="5">Entertainment</option>
          <option value="6">Garden</option>
          <option value="2">Airport</option>
          <option value="3">Cars</option>
        </select>
      </span> 
  
 
 
 
  
  
$(document).ready(function(){
    $('select').on('change', function() {
    alert( this.value );
    })
}); 
  
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span class="location select-box">
  <input class="value-holder" type="text" disabled="disabled" placeholder="Select a Location">
<div class="advanced-select-button">
  <i class="fa fa-chevron-down"></i>
</div>
<ul class="select-clone custom-list">
  <li data-value="1">Advertising</li>
  <li data-value="2">Airport</li>
  <li data-value="3">Cars</li>
  <li data-value="4">Education</li>
  <li data-value="5">Entertainment</li>
  <li data-value="6">Garden</li>
  <li data-value="2">Airport</li>
  <li data-value="3">Cars</li>
  <li data-value="4">Education</li>
  <li data-value="5">Entertainment</li>
  <li data-value="6">Garden</li>
  <li data-value="2">Airport</li>
  <li data-value="3">Cars</li>
</ul>

<select name="Select_Location" data-placeholder="Select a Location">
   <option>Select Category</option>
          <option value="1">Advertising</option>
          <option value="2">Airport</option>
          <option value="3">Cars</option>
          <option value="4">Education</option>
          <option value="5">Entertainment</option>
          <option value="6">Garden</option>
          <option value="2">Airport</option>
          <option value="3">Cars</option>
          <option value="4">Education</option>
          <option value="5">Entertainment</option>
          <option value="6">Garden</option>
          <option value="2">Airport</option>
          <option value="3">Cars</option>
        </select>
      </span>