jQuery:在jQuery对象中存储其他/额外的数据/信息吗? [英] jQuery: Store additional/extra data/info inside a jQuery object?

问题描述

在jQuery对象中存储额外的数据是否可能并且很聪明?

Is it possible and smart to store extra data inside a jQuery object?

现在，我有一些包含某些数据的对象，但是这些对象也具有该数据的可视表示.这可行，但是我有很多代码可以使它们保持同步.

Right now I have objects that contain some data but these objects also have a visual representation of that data. This works but I have a lot of code to keep them both in sync.

例如，如果您从dom中删除一个对象，我还必须从对象数组中删除相关的对象.删除是相当简单的，但是如果我开始对对象进行排序/移动，它会变得更加复杂.

For example if you delete an object from the dom I also have to delete the related object from the object array. Deleting is fairly simple but it gets a little more complicated if I start sorting/moving the objects around.

推荐答案

您可以使用 $.data() 为此:)

You can use $.data() for this :)

例如:

$.data(element, 'varName', value);      //store
var value = $.data(element, 'varName'); //get

或使用对象方法 .data() :

Or use the object method .data():

$("#ElementID").data('varName', value);      //store
var value = $("#ElementID").data('varName'); //get

这不会在对象上存储数据，而是将其存储在$.cache中(在此页面上的控制台中尝试)，但是它通过.

This doesn't store the data on the object, rather it stores it in $.cache (try it in your console on this page), but it's associated with the object, via this[$.expando].

但是，如果您调用 .empty() 来删除对象，或者 .removeData() 或

However if you call .empty() that removes an object, or .remove(), it'll do the cleanup for you. You can also call .removeData() or $.removeData() to remove it directly.

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