Javascript运行时错误：$未定义
[英]Javascript Runtime error: $ is undefined
问题描述
I have added script in my Default.aspx page. 
我在Default.aspx页面中添加了脚本。 I am getting following error. 我收到了以下错误。
5 个解决方案
解决方案1
28 已采纳 2013-07-14 08:51:19
$ is defined by jQuery, which you probably haven't referenced. $由jQuery定义，您可能没有引用它。 A simple way to get it is to add one of the CDN urls to your template HTML: 获取它的一种简单方法是将一个CDN网址添加到模板HTML中：
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
解决方案2
4 2013-07-14 08:51:33
You need to include jQuery: http://learn.jquery.com/about-jquery/how-jquery-works/ 你需要包含jQuery： http ： //learn.jquery.com/about-jquery/how-jquery-works/
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>Demo</title>
**<script src="jquery.js"></script>**
</head>
<body>
...
</body>
</html>
解决方案3
4 2015-12-10 21:14:01
I had the same problem, but did have a correct reference to jQuery. 我有同样的问题，但确实有一个正确的jQuery引用。
I solved it by referencing jQuery before any other scripts. 我通过在任何其他脚本之前引用jQuery来解决它。 In your case, it would look like this: 在你的情况下，它看起来像这样：
<script src= "scripts/jquery-ui.js" />
<script src= "scripts/JavaScript_scroll.js" />
Hope this helps anyone else with a similar issue. 希望这有助于其他任何有类似问题的人。
解决方案4
1 2014-04-29 20:32:47
I had the Same Problem as that $ is Unidentified, After a long struggle, I come to know that there is some thing HTML coder error in Master Page, So it worked fine when i include the Jquery files directly in Content page 我有同样的问题，因为$是未识别的，经过长时间的斗争，我才知道母版页中有一些HTML编码器错误， So it worked fine when i include the Jquery files directly in Content page
解决方案5
0 2016-04-19 15:21:28
(For others who may face the same problem as OP's) （对于可能遇到与OP相同问题的其他人）
I had the same problem, but the reason was that I was trying to load my jQuery script before loading the jQuery library itself. 我有同样的问题，但原因是我在加载jQuery库本身之前尝试加载我的jQuery脚本。 In other words, make sure that you first add this line: 换句话说，请确保首先添加此行：
<script src="Scripts/jquery-{version}.min.js"></script>
before adding 在添加之前
<script src="Scripts/JavaSript_scroll.js"></script>
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