作为新添加时，JQuery在JSFiddle中不起作用 [英] JQuery not working in JSFiddle when adding as new

问题描述

这是代码

HTML

<select id="selectChange" name="selectChange">
    <option value='1' >One</option>
    <option value='2' >Two</option>
    <option value='3' >Three</option>
    <option value='4' >Four</option>
</select>

JQuery

$('#selectChange').change(function(){
        alert( $(this).val());
    });

我在选择更改事件上为JQuery创建了JSFiddle. 这是该链接. 如您所见，它不起作用.

I created a JSFiddle for JQuery on select change event. This is the link to that. As you can see, it is not working.

然后我在选择更改事件表单SO答案上得到了一个jQuery的JSFidle工作链接.(不要记住在哪里.)

Then I got one JSFidle working link for JQuery on select change event form SO answer.(Don't remeber where.)

然后，我将代码更新为我在上一个链接中已经编写的代码. 这是更新的JSFiddle链接.而且工作正常.如果ypu从第二个URL中删除 /29/ ，则可以看到旧的JSFidle链接.

Then I updated the code to the one I already wrote in the previous link. This is the updated JSFiddle link . And it is working fine. If ypu remove the /29/ from this second URL, you can see the old JSFidle link.

您可以看到两个代码相同.但是，为什么第一个不起作用?每当我尝试为JQuery创建新的JSFiddle时，我都无法执行它，我需要检查是否存在任何已有的JSFiddle并进行更新.

You can see both the code are same. But why the first one is not working? Whenever I try to create a new JSFiddle for JQuery, I'm not able to perform it and I need to check for any already existing one and update it.

推荐答案

您需要在 Frameworks&标题下方的第一个下拉列表中选择jQuery版本.扩展.

此刻，它已设置为无库(纯JS).这意味着无法使用jQuery.

At the moment it's set to No library (Pure JS). This means jQuery is not available to use.

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