未捕获的TypeError：无法读取未定义的属性'ajax'当我尝试将数据发送到url时 [英] Uncaught TypeError: Cannot read property 'ajax' of undefined When I'm trying to send data to url

问题描述

我创建了一个表单来获取用户的反馈，我只是想将表单数据发送到url，但是我收到了这个错误：

I have created a form to get feedback from user, I’m simply trying to send form data to url, but I’m getting this error:

Uncaught TypeError：无法读取未定义的属性'ajax'

Uncaught TypeError: Cannot read property 'ajax' of undefined

function sendData(){
    $.ajax({
        url: "www.yashkjhsah.php",
        type: "POST",
        async: true,
        data: $(".contacts_form").serialize(),
        dataType: "html",
        success: function(data) 
        {
            alert(data);
            if(data!="Error in Insert Query!")
            {
                alert("Thank you for Enquiry we will send answer in your Mail.");
            }
            else
            {
                alert("Error while saving the data");
            }
        }
    });
}

推荐答案

错误消息显示jQuery没有定义。
在使用$ .ajax执行任何操作之前必须包含jQuery

The error message says that jQuery is not define. You must include jQuery before doing anything with $.ajax

将此行放在脚本之前的html页面中：
< script src =https://code.jquery.com/jquery-1.11.3.min.js>< / script>

Put this line in the html page before your script : <script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>

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