问题与jQuery数据（）处理字符串为数字 [英] Issue with jQuery data() treating string as number

问题描述

我有一个MySQL的BIGINT，我在HTML5数据存储。然后我尝试访问该值，并通过AJAX调用传递。

 < div data-id =211285677671858177 > 
  

和JavaScript：

  var send_data = {
 id：''+ $（this）.data（'id'）
} 
 $ .post（'/ send.php' ，send_data）; 
  

问题在于jQuery data 函数似乎检索该值作为一个浮点而不是一个字符串。所以把它附加到一个空白的字符串是没有帮助的，因为它已经太晚了 - 已经被四舍五入了（在这个例子中是 211285677671858180 ）。我可以做些什么来解决这个问题？

解决方案

这实际上并不是long int的情况，重新获得是最接近的可用表示形式作为浮点数。

无论如何，你想要一个字符串的值。引用针对 .data 的jQuery文档（重点我的每一个尝试都是将字符串转换为一个JavaScript值
（这包括布尔值，数字，对象等等）。
$ b 数组和空值）否则
它保留为一个字符串。 要将值的属性作为字符串
检索，而不尝试转换它，请使用attr（）方法。

I have a MySQL BIGINT that I am storing in HTML5 data. Then I'm trying to access that value and pass it through an AJAX call.

<div data-id="211285677671858177">

And the JavaScript:

var send_data = {
    id: '' + $(this).data('id')
}
$.post('/send.php', send_data);

The issue is that the jQuery data function seems to retrieve that value as a floating point and not a string. So appending it to a blank string isn't helping because it's already too late - it's already been rounded (in this case to 211285677671858180). What can I do to fix this?

解决方案

This isn't a case of "long int" really, the number you're getting is the closest available representation as a floating-point number.

Anyway, you want the value as a string. Quote the jQuery docs for .data (emphasis mine):

Every attempt is made to convert the string to a JavaScript value (this includes booleans, numbers, objects, arrays, and null) otherwise it is left as a string. To retrieve the value's attribute as a string without any attempt to convert it, use the attr() method.

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