Javascript Ajax 的控制台错误：ReferenceError：$ 未定义
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Console Error with Ajax: ReferenceError: $ is not defined
提问by moritz.muecke
i have a problem with a little script on my html page. It's just a function which should be called by an onclick method in an a tag. It dont works. Everytime i click on the link in the browser the console says "ReferenceError: $ is not defined" and points on the third line of the code below.
我的 html 页面上的一个小脚本有问题。它只是一个应该由 a 标签中的 onclick 方法调用的函数。它不起作用。每次我点击浏览器中的链接时，控制台都会显示“ReferenceError: $ is not defined”并指向下面代码的第三行。
<script>
function del(urlToDelete) {
$.ajax({
url: urlToDelete,
type: 'DELETE',
success: function(results) {
location.reload();
}
});
}
</script>
回答by Arindam Nayak
You need to include jquery library for that.Like this. You need to include this 1st, then write $.ajaxto execute.
您需要为此包含 jquery 库。像这样。您需要包含第一个，然后写入$.ajax执行。
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
回答by LiamWilson94
It looks like the jQuery libraries have not been included within your project.
看起来您的项目中尚未包含 jQuery 库。
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
回答by Sourabh Sinha
The above answers use http version,which might not be allowed at production ,alternatively use:
上面的答案使用 http 版本，在生产中可能不允许，或者使用：
<script
src="https://code.jquery.com/jquery-3.4.1.min.js"
integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
crossorigin="anonymous"></script>
or visit: https://code.jquery.com/
或访问：https: //code.jquery.com/
