如何从数据属性获取数据键名? [英] How to get data key name from data attribute?

问题描述

我想从我的html元素中获取键名吗?

I want to get key name from my html element?

示例代码:

 <td data-code="123">220</td>

使用jquery数据方法，我可以输入键值，但我想提取键名?

Using jquery data method I am able to key value but I want to extract key name?

var keyValue=$("td").data("code"); //123


var keyName=?????

推荐答案

数据代码将是实现这一目标的关键.

data-code would be the key for that.

如果要获取未知键/值对的键，可以使用for (var key in data) {}循环:

If you want to get the keys for unknown key/value pairs you can use a for (var key in data) {} loop:

var all_values = [],
    data       = $('td').data();
for (var key in data) {
    all_values.push([key, data[key]]);
}
//you can now access the key/value pairs as an array of an array

//if $(td).data() returns: `{code : 123}` then this code would return: [ [code, 123] ]
//you could get the first key with: all_values[0][0] and its corresponding value: all_values[0][1]

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